From c63144e78be32977230170c4b6b46b43a37a6324 Mon Sep 17 00:00:00 2001
From: Ivan <8611739+IRBorisov@users.noreply.github.com>
Date: Tue, 12 Aug 2025 15:40:39 +0300
Subject: [PATCH] F: Implementing Nominal cst_type

---
 .vscode/settings.json                         |   2 +
 .../apps/rsform/serializers/data_access.py    |  17 +-
 .../apps/rsform/serializers/io_pyconcept.py   |   6 +-
 .../rsform/tests/s_views/t_constituenta.py    | 156 ++++++++++++------
 .../apps/rsform/tests/s_views/t_rsforms.py    |  48 ------
 rsconcept/frontend/src/components/icons.tsx   |   5 +-
 .../src/features/ai/models/prompting-api.ts   |   6 +-
 .../features/help/items/help-thesaurus.tsx    |   6 +
 .../src/features/library/backend/types.ts     |  12 +-
 .../src/features/oss/models/oss-api.ts        |  18 +-
 .../side-panel/toolbar-schema.tsx             |  12 +-
 .../features/rsform/backend/rsform-loader.ts  |  24 ++-
 .../src/features/rsform/backend/types.ts      |  34 ++--
 .../frontend/src/features/rsform/colors.ts    |  10 ++
 .../rsform/components/badge-constituenta.tsx  |   6 +-
 .../rsform/components/icon-cst-type.tsx       |   4 +-
 .../rsform/components/info-constituenta.tsx   |  10 +-
 .../rsform/components/rsform-stats.tsx        |  17 +-
 .../components/term-graph/graph/tg-node.tsx   |   6 +-
 .../dlg-create-cst/form-create-cst.tsx        |  15 +-
 .../dlg-cst-template/template-state.tsx       |   2 +-
 .../dialogs/dlg-edit-cst/form-edit-cst.tsx    |  50 +++---
 .../rsform/dialogs/dlg-graph-params.tsx       |  71 ++++----
 .../frontend/src/features/rsform/labels.ts    |  33 +++-
 .../src/features/rsform/models/graph-api.ts   |   1 +
 .../src/features/rsform/models/rsform-api.ts  |  14 +-
 .../src/features/rsform/models/rsform.ts      |   4 +-
 .../editor-constituenta/form-constituenta.tsx |  66 ++++----
 .../editor-rsexpression.tsx                   |  15 ++
 .../editor-rsexpression/status-bar.tsx        |   2 +-
 .../editor-rslist/editor-rslist.tsx           |   1 +
 .../editor-term-graph/toolbar-term-graph.tsx  |  12 +-
 .../src/features/rsform/stores/term-graph.ts  |  18 +-
 .../src/features/users/backend/types.ts       |   2 +-
 34 files changed, 412 insertions(+), 293 deletions(-)

diff --git a/.vscode/settings.json b/.vscode/settings.json
index 1885f80d..b5b0b321 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -216,6 +216,8 @@
     "неинтерпретируемый",
     "неитерируемого",
     "Никанорова",
+    "Номеноид",
+    "Номеноиды",
     "операционализации",
     "операционализированных",
     "Оргтеор",
diff --git a/rsconcept/backend/apps/rsform/serializers/data_access.py b/rsconcept/backend/apps/rsform/serializers/data_access.py
index 1b75f83f..e20e5c5c 100644
--- a/rsconcept/backend/apps/rsform/serializers/data_access.py
+++ b/rsconcept/backend/apps/rsform/serializers/data_access.py
@@ -27,7 +27,7 @@ class AssociationSerializer(StrictModelSerializer):
     class Meta:
         ''' serializer metadata. '''
         model = Association
-        fields = ('argument', 'operation')
+        fields = ('container', 'associate')
 
 
 class CstBaseSerializer(StrictModelSerializer):
@@ -121,11 +121,6 @@ class CstCreateSerializer(StrictModelSerializer):
     )
     alias = serializers.CharField(max_length=8)
     cst_type = serializers.ChoiceField(CstType.choices)
-    associations = PKField(
-        many=True,
-        required=False,
-        queryset=Constituenta.objects.all().only('schema_id', 'pk')
-    )
 
     class Meta:
         ''' serializer metadata. '''
@@ -133,7 +128,7 @@ class CstCreateSerializer(StrictModelSerializer):
         fields = \
             'alias', 'cst_type', 'convention', 'crucial', \
             'term_raw', 'definition_raw', 'definition_formal', \
-            'insert_after', 'term_forms', 'associations'
+            'insert_after', 'term_forms'
 
     def validate(self, attrs):
         schema = cast(LibraryItem, self.context['schema'])
@@ -142,12 +137,6 @@ class CstCreateSerializer(StrictModelSerializer):
             raise serializers.ValidationError({
                 'insert_after': msg.constituentaNotInRSform(schema.title)
             })
-        associations = attrs.get('associations', [])
-        for assoc in associations:
-            if assoc.schema_id != schema.pk:
-                raise serializers.ValidationError({
-                    'associations': msg.constituentaNotInRSform(schema.title)
-                })
         return attrs
 
 
@@ -322,6 +311,8 @@ class RSFormParseSerializer(StrictModelSerializer):
     def _parse_data(self, data: dict) -> dict:
         parse = PyConceptAdapter(data).parse()
         for cst_data in data['items']:
+            if cst_data['cst_type'] == CstType.NOMINAL:
+                continue
             cst_data['parse'] = next(
                 cst['parse'] for cst in parse['items']
                 if cst['id'] == cst_data['id']
diff --git a/rsconcept/backend/apps/rsform/serializers/io_pyconcept.py b/rsconcept/backend/apps/rsform/serializers/io_pyconcept.py
index 47e07857..1966538c 100644
--- a/rsconcept/backend/apps/rsform/serializers/io_pyconcept.py
+++ b/rsconcept/backend/apps/rsform/serializers/io_pyconcept.py
@@ -6,7 +6,7 @@ import pyconcept
 
 from shared import messages as msg
 
-from ..models import Constituenta
+from ..models import Constituenta, CstType
 
 
 class PyConceptAdapter:
@@ -34,7 +34,7 @@ class PyConceptAdapter:
         result: dict = {
             'items': []
         }
-        items = Constituenta.objects.filter(schema_id=schemaID).order_by('order')
+        items = Constituenta.objects.filter(schema_id=schemaID).exclude(cst_type=CstType.NOMINAL).order_by('order')
         for cst in items:
             result['items'].append({
                 'entityUID': cst.pk,
@@ -51,6 +51,8 @@ class PyConceptAdapter:
             'items': []
         }
         for cst in data['items']:
+            if cst['cst_type'] == CstType.NOMINAL:
+                continue
             result['items'].append({
                 'entityUID': cst['id'],
                 'cstType': cst['cst_type'],
diff --git a/rsconcept/backend/apps/rsform/tests/s_views/t_constituenta.py b/rsconcept/backend/apps/rsform/tests/s_views/t_constituenta.py
index a0f97f03..e3217730 100644
--- a/rsconcept/backend/apps/rsform/tests/s_views/t_constituenta.py
+++ b/rsconcept/backend/apps/rsform/tests/s_views/t_constituenta.py
@@ -12,7 +12,7 @@ class TestConstituentaAPI(EndpointTester):
         self.owned_id = self.owned.model.pk
         self.unowned = RSForm.create(title='Test2', alias='T2')
         self.unowned_id = self.unowned.model.pk
-        self.cst1 = Constituenta.objects.create(
+        self.x1 = Constituenta.objects.create(
             alias='X1',
             cst_type=CstType.BASE,
             schema=self.owned.model,
@@ -21,119 +21,175 @@ class TestConstituentaAPI(EndpointTester):
             term_raw='Test1',
             term_resolved='Test1R',
             term_forms=[{'text': 'form1', 'tags': 'sing,datv'}])
-        self.cst2 = Constituenta.objects.create(
+        self.x2 = Constituenta.objects.create(
             alias='X2',
             cst_type=CstType.BASE,
-            schema=self.unowned.model,
-            order=0,
+            schema=self.owned.model,
+            order=1,
             convention='Test1',
             term_raw='Test2',
             term_resolved='Test2R'
         )
-        self.cst3 = Constituenta.objects.create(
+        self.x3 = Constituenta.objects.create(
             alias='X3',
             schema=self.owned.model,
-            order=1,
+            order=2,
             term_raw='Test3',
             term_resolved='Test3',
             definition_raw='Test1',
             definition_resolved='Test2'
         )
-        self.invalid_cst = self.cst3.pk + 1337
+        self.unowned_cst = self.unowned.insert_last(alias='X1', cst_type=CstType.BASE)
+        self.invalid_cst = self.x3.pk + 1337
 
-    @decl_endpoint('/api/rsforms/{schema}/update-cst', method='patch')
+    @decl_endpoint('/api/rsforms/{item}/update-cst', method='patch')
     def test_partial_update(self):
-        data = {'target': self.cst1.pk, 'item_data': {'convention': 'tt'}}
-        self.executeForbidden(data, schema=self.unowned_id)
+        data = {'target': self.x1.pk, 'item_data': {'convention': 'tt'}}
+        self.executeForbidden(data, item=self.unowned_id)
 
         self.logout()
-        self.executeForbidden(data, schema=self.owned_id)
+        self.executeForbidden(data, item=self.owned_id)
 
         self.login()
         self.executeOK(data)
-        self.cst1.refresh_from_db()
-        self.assertEqual(self.cst1.convention, 'tt')
+        self.x1.refresh_from_db()
+        self.assertEqual(self.x1.convention, 'tt')
 
         self.executeOK(data)
 
 
-    @decl_endpoint('/api/rsforms/{schema}/update-cst', method='patch')
+    @decl_endpoint('/api/rsforms/{item}/update-cst', method='patch')
     def test_partial_update_rename(self):
-        data = {'target': self.cst1.pk, 'item_data': {'alias': self.cst3.alias}}
-        self.executeBadData(data, schema=self.owned_id)
+        data = {'target': self.x1.pk, 'item_data': {'alias': self.x3.alias}}
+        self.executeBadData(data, item=self.owned_id)
 
         d1 = self.owned.insert_last(
             alias='D1',
             term_raw='@{X1|plur}',
             definition_formal='X1'
         )
-        self.assertEqual(self.cst1.order, 0)
-        self.assertEqual(self.cst1.alias, 'X1')
-        self.assertEqual(self.cst1.cst_type, CstType.BASE)
+        self.assertEqual(self.x1.order, 0)
+        self.assertEqual(self.x1.alias, 'X1')
+        self.assertEqual(self.x1.cst_type, CstType.BASE)
 
-        data = {'target': self.cst1.pk, 'item_data': {'alias': 'D2', 'cst_type': CstType.TERM}}
-        self.executeOK(data, schema=self.owned_id)
+        data = {'target': self.x1.pk, 'item_data': {'alias': 'D2', 'cst_type': CstType.TERM}}
+        self.executeOK(data, item=self.owned_id)
         d1.refresh_from_db()
-        self.cst1.refresh_from_db()
+        self.x1.refresh_from_db()
         self.assertEqual(d1.term_resolved, '')
         self.assertEqual(d1.term_raw, '@{D2|plur}')
-        self.assertEqual(self.cst1.order, 0)
-        self.assertEqual(self.cst1.alias, 'D2')
-        self.assertEqual(self.cst1.cst_type, CstType.TERM)
+        self.assertEqual(self.x1.order, 0)
+        self.assertEqual(self.x1.alias, 'D2')
+        self.assertEqual(self.x1.cst_type, CstType.TERM)
 
 
-    @decl_endpoint('/api/rsforms/{schema}/update-cst', method='patch')
+    @decl_endpoint('/api/rsforms/{item}/update-cst', method='patch')
     def test_update_resolved_no_refs(self):
         data = {
-            'target': self.cst3.pk,
+            'target': self.x3.pk,
             'item_data': {
                 'term_raw': 'New term',
                 'definition_raw': 'New def'
             }
         }
-        self.executeOK(data, schema=self.owned_id)
-        self.cst3.refresh_from_db()
-        self.assertEqual(self.cst3.term_resolved, 'New term')
-        self.assertEqual(self.cst3.definition_resolved, 'New def')
+        self.executeOK(data, item=self.owned_id)
+        self.x3.refresh_from_db()
+        self.assertEqual(self.x3.term_resolved, 'New term')
+        self.assertEqual(self.x3.definition_resolved, 'New def')
 
 
-    @decl_endpoint('/api/rsforms/{schema}/update-cst', method='patch')
+    @decl_endpoint('/api/rsforms/{item}/update-cst', method='patch')
     def test_update_resolved_refs(self):
         data = {
-            'target': self.cst3.pk,
+            'target': self.x3.pk,
             'item_data': {
                 'term_raw': '@{X1|nomn,sing}',
                 'definition_raw': '@{X1|nomn,sing} @{X1|sing,datv}'
             }
         }
-        self.executeOK(data, schema=self.owned_id)
-        self.cst3.refresh_from_db()
-        self.assertEqual(self.cst3.term_resolved, self.cst1.term_resolved)
-        self.assertEqual(self.cst3.definition_resolved, f'{self.cst1.term_resolved} form1')
+        self.executeOK(data, item=self.owned_id)
+        self.x3.refresh_from_db()
+        self.assertEqual(self.x3.term_resolved, self.x1.term_resolved)
+        self.assertEqual(self.x3.definition_resolved, f'{self.x1.term_resolved} form1')
 
-    @decl_endpoint('/api/rsforms/{schema}/update-cst', method='patch')
+
+    @decl_endpoint('/api/rsforms/{item}/update-cst', method='patch')
     def test_update_term_forms(self):
         data = {
-            'target': self.cst3.pk,
+            'target': self.x3.pk,
             'item_data': {
                 'definition_raw': '@{X3|sing,datv}',
                 'term_forms': [{'text': 'form1', 'tags': 'sing,datv'}]
             }
         }
-        self.executeOK(data, schema=self.owned_id)
-        self.cst3.refresh_from_db()
-        self.assertEqual(self.cst3.definition_resolved, 'form1')
-        self.assertEqual(self.cst3.term_forms, data['item_data']['term_forms'])
+        self.executeOK(data, item=self.owned_id)
+        self.x3.refresh_from_db()
+        self.assertEqual(self.x3.definition_resolved, 'form1')
+        self.assertEqual(self.x3.term_forms, data['item_data']['term_forms'])
 
-    @decl_endpoint('/api/rsforms/{schema}/update-crucial', method='patch')
+
+    @decl_endpoint('/api/rsforms/{item}/update-crucial', method='patch')
     def test_update_crucial(self):
-        data = {'target': [self.cst1.pk], 'value': True}
-        self.executeForbidden(data, schema=self.unowned_id)
+        data = {'target': [self.x1.pk], 'value': True}
+        self.executeForbidden(data, item=self.unowned_id)
 
         self.logout()
-        self.executeForbidden(data, schema=self.owned_id)
+        self.executeForbidden(data, item=self.owned_id)
 
         self.login()
-        self.executeOK(data, schema=self.owned_id)
-        self.cst1.refresh_from_db()
-        self.assertEqual(self.cst1.crucial, True)
+        self.executeOK(data, item=self.owned_id)
+        self.x1.refresh_from_db()
+        self.assertEqual(self.x1.crucial, True)
+
+
+    @decl_endpoint('/api/rsforms/{item}/create-cst', method='post')
+    def test_create_constituenta(self):
+        data = {'alias': 'X4', 'cst_type': CstType.BASE}
+        self.executeForbidden(data, item=self.unowned_id)
+
+        data = {'alias': 'X4'}
+        self.executeBadData(item=self.owned_id)
+        self.executeBadData(data)
+
+        data['cst_type'] = 'invalid'
+        self.executeBadData(data)
+
+        data = {
+            'alias': 'X4',
+            'cst_type': CstType.BASE,
+            'term_raw': 'test',
+            'term_forms': [{'text': 'form1', 'tags': 'sing,datv'}],
+            'definition_formal': 'invalid',
+            'crucial': True
+        }
+        response = self.executeCreated(data)
+        self.assertEqual(response.data['new_cst']['alias'], data['alias'])
+        x4 = Constituenta.objects.get(alias=response.data['new_cst']['alias'])
+        self.assertEqual(x4.order, 3)
+        self.assertEqual(x4.term_raw, data['term_raw'])
+        self.assertEqual(x4.term_forms, data['term_forms'])
+        self.assertEqual(x4.definition_formal, data['definition_formal'])
+        self.assertEqual(x4.crucial, data['crucial'])
+
+
+    @decl_endpoint('/api/rsforms/{item}/create-cst', method='post')
+    def test_create_constituenta_after(self):
+        self.set_params(item=self.owned_id)
+
+        data = {'alias': 'X4', 'cst_type': CstType.BASE, 'insert_after': self.invalid_cst}
+        self.executeBadData(data)
+
+        data['insert_after'] = self.unowned_cst.pk
+        self.executeBadData(data)
+
+        data = {
+            'alias': 'X4',
+            'cst_type': CstType.BASE,
+            'insert_after': self.x2.pk,
+        }
+        response = self.executeCreated(data)
+        self.assertEqual(response.data['new_cst']['alias'], data['alias'])
+        x4 = Constituenta.objects.get(alias=response.data['new_cst']['alias'])
+        self.x3.refresh_from_db()
+        self.assertEqual(x4.order, 2)
+        self.assertEqual(self.x3.order, 3)
diff --git a/rsconcept/backend/apps/rsform/tests/s_views/t_rsforms.py b/rsconcept/backend/apps/rsform/tests/s_views/t_rsforms.py
index a054581c..388a2681 100644
--- a/rsconcept/backend/apps/rsform/tests/s_views/t_rsforms.py
+++ b/rsconcept/backend/apps/rsform/tests/s_views/t_rsforms.py
@@ -200,54 +200,6 @@ class TestRSFormViewset(EndpointTester):
                 self.assertIn('document.json', zipped_file.namelist())
 
 
-    @decl_endpoint('/api/rsforms/{item}/create-cst', method='post')
-    def test_create_constituenta(self):
-        data = {'alias': 'X3', 'cst_type': CstType.BASE}
-        self.executeForbidden(data, item=self.unowned_id)
-
-        data = {'alias': 'X3'}
-        self.owned.insert_last('X1')
-        x2 = self.owned.insert_last('X2')
-        self.executeBadData(item=self.owned_id)
-        self.executeBadData(data)
-
-        data['cst_type'] = 'invalid'
-        self.executeBadData(data)
-
-        data['cst_type'] = CstType.BASE
-        response = self.executeCreated(data)
-        self.assertEqual(response.data['new_cst']['alias'], 'X3')
-        x3 = Constituenta.objects.get(alias=response.data['new_cst']['alias'])
-        self.assertEqual(x3.order, 2)
-
-        data = {
-            'alias': 'X4',
-            'cst_type': CstType.BASE,
-            'insert_after': x2.pk,
-            'term_raw': 'test',
-            'term_forms': [{'text': 'form1', 'tags': 'sing,datv'}],
-            'definition_formal': 'invalid',
-            'crucial': True
-        }
-        response = self.executeCreated(data)
-        self.assertEqual(response.data['new_cst']['alias'], data['alias'])
-        x4 = Constituenta.objects.get(alias=response.data['new_cst']['alias'])
-        self.assertEqual(x4.order, 2)
-        self.assertEqual(x4.term_raw, data['term_raw'])
-        self.assertEqual(x4.term_forms, data['term_forms'])
-        self.assertEqual(x4.definition_formal, data['definition_formal'])
-        self.assertEqual(x4.crucial, data['crucial'])
-
-        data = {
-            'alias': 'X5',
-            'cst_type': CstType.BASE,
-            'insert_after': None,
-            'term_raw': 'test5'
-        }
-        response = self.executeCreated(data)
-        self.assertEqual(response.data['new_cst']['alias'], data['alias'])
-
-
     @decl_endpoint('/api/rsforms/{item}/substitute', method='patch')
     def test_substitute_multiple(self):
         self.set_params(item=self.owned_id)
diff --git a/rsconcept/frontend/src/components/icons.tsx b/rsconcept/frontend/src/components/icons.tsx
index e8164574..c0fdf7ef 100644
--- a/rsconcept/frontend/src/components/icons.tsx
+++ b/rsconcept/frontend/src/components/icons.tsx
@@ -12,7 +12,7 @@ export { BiX              as IconRemove }         from 'react-icons/bi';
 export { BiTrash          as IconDestroy }        from 'react-icons/bi';
 export { BiReset          as IconReset }          from 'react-icons/bi';
 export { TbArrowsDiagonal2 as IconResize }        from 'react-icons/tb';
-export { FiEdit           as IconEdit }          from 'react-icons/fi';
+export { FiEdit           as IconEdit }           from 'react-icons/fi';
 export { AiOutlineEdit    as IconEdit2 }          from 'react-icons/ai';
 export { BiSearchAlt2     as IconSearch }         from 'react-icons/bi';
 export { BiDownload       as IconDownload }       from 'react-icons/bi';
@@ -87,6 +87,7 @@ export { MdOutlineSelectAll as IconConceptBlock } from 'react-icons/md';
 export { TbHexagon        as IconRSForm }         from 'react-icons/tb';
 export { TbAssembly       as IconRSFormOwned }    from 'react-icons/tb';
 export { TbBallFootball   as IconRSFormImported } from 'react-icons/tb';
+export { TbHexagonLetterN as IconCstNominal }     from 'react-icons/tb';
 export { TbHexagonLetterX as IconCstBaseSet }     from 'react-icons/tb';
 export { TbHexagonLetterC as IconCstConstSet }    from 'react-icons/tb';
 export { TbHexagonLetterS as IconCstStructured }  from 'react-icons/tb';
@@ -125,7 +126,7 @@ export { RiOpenSourceLine as IconPublic }         from 'react-icons/ri';
 export { RiShieldLine     as IconProtected }      from 'react-icons/ri';
 export { RiShieldKeyholeLine as IconPrivate }     from 'react-icons/ri';
 export { BiBug            as IconStatusError }    from 'react-icons/bi';
-export { BiCheckCircle    as IconStatusOK }       from 'react-icons/bi';
+export { LuThumbsUp       as IconStatusOK }       from 'react-icons/lu';
 export { BiHelpCircle     as IconStatusUnknown }  from 'react-icons/bi';
 export { BiStopCircle     as IconStatusIncalculable } from 'react-icons/bi';
 export { BiPauseCircle    as IconStatusProperty } from 'react-icons/bi';
diff --git a/rsconcept/frontend/src/features/ai/models/prompting-api.ts b/rsconcept/frontend/src/features/ai/models/prompting-api.ts
index 3c2eb3be..fe4333e6 100644
--- a/rsconcept/frontend/src/features/ai/models/prompting-api.ts
+++ b/rsconcept/frontend/src/features/ai/models/prompting-api.ts
@@ -89,7 +89,9 @@ export function varSchemaGraph(schema: IRSForm): string {
 /** Generates a prompt for a schema type graph variable. */
 export function varSchemaTypeGraph(schema: IRSForm): string {
   const graph = new TypificationGraph();
-  schema.items.forEach(item => graph.addConstituenta(item.alias, item.parse.typification, item.parse.args));
+  schema.items.forEach(item => {
+    if (item.parse) graph.addConstituenta(item.alias, item.parse.typification, item.parse.args);
+  });
 
   let result = `Название концептуальной схемы: ${schema.title}\n`;
   result += `[${schema.alias}] Описание: "${schema.description}"\n\n`;
@@ -154,6 +156,6 @@ export function varSyntaxTree(cst: IConstituenta): string {
   let result = `Конституента: ${cst.alias}\n`;
   result += `Формальное выражение: ${cst.definition_formal}\n`;
   result += `Дерево синтаксического разбора:\n`;
-  result += JSON.stringify(cst.parse.syntaxTree, null, PARAMETER.indentJSON);
+  result += cst.parse ? JSON.stringify(cst.parse.syntaxTree, null, PARAMETER.indentJSON) : 'не определено';
   return result;
 }
diff --git a/rsconcept/frontend/src/features/help/items/help-thesaurus.tsx b/rsconcept/frontend/src/features/help/items/help-thesaurus.tsx
index 1f88b453..fe8c504f 100644
--- a/rsconcept/frontend/src/features/help/items/help-thesaurus.tsx
+++ b/rsconcept/frontend/src/features/help/items/help-thesaurus.tsx
@@ -7,6 +7,7 @@ import {
   IconCstBaseSet,
   IconCstConstSet,
   IconCstFunction,
+  IconCstNominal,
   IconCstPredicate,
   IconCstStructured,
   IconCstTerm,
@@ -118,6 +119,11 @@ export function HelpThesaurus() {
 
       <ul>
         <b>Типы конституент</b>
+        <li>
+          <IconCstNominal size='1rem' className='inline-icon' />
+          {'\u2009'}Номеноид (N#) – предметная сущность, не имеющая четкого определения, используемая для ассоциативной
+          группировки конституент и предварительной фиксации содержательных отношений.
+        </li>
         <li>
           <IconCstBaseSet size='1rem' className='inline-icon' />
           {'\u2009'}Базисное множество (X#) – неопределяемое понятие, представленное множеством различимых элементов.
diff --git a/rsconcept/frontend/src/features/library/backend/types.ts b/rsconcept/frontend/src/features/library/backend/types.ts
index 4c795222..1808d2f4 100644
--- a/rsconcept/frontend/src/features/library/backend/types.ts
+++ b/rsconcept/frontend/src/features/library/backend/types.ts
@@ -60,7 +60,7 @@ export const schemaLibraryItemType = z.enum(Object.values(LibraryItemType) as [L
 export const schemaAccessPolicy = z.enum(Object.values(AccessPolicy) as [AccessPolicy, ...AccessPolicy[]]);
 
 export const schemaLibraryItem = z.strictObject({
-  id: z.coerce.number(),
+  id: z.number(),
   item_type: schemaLibraryItemType,
 
   alias: z.string().nonempty(),
@@ -72,9 +72,9 @@ export const schemaLibraryItem = z.strictObject({
   location: z.string(),
   access_policy: schemaAccessPolicy,
 
-  time_create: z.string().datetime({ offset: true }),
-  time_update: z.string().datetime({ offset: true }),
-  owner: z.coerce.number().nullable()
+  time_create: z.iso.datetime({ offset: true }),
+  time_update: z.iso.datetime({ offset: true }),
+  owner: z.number().nullable()
 });
 
 export const schemaLibraryItemArray = z.array(schemaLibraryItem);
@@ -126,10 +126,10 @@ export const schemaUpdateLibraryItem = schemaInputLibraryItem
   });
 
 export const schemaVersionInfo = z.strictObject({
-  id: z.coerce.number(),
+  id: z.number(),
   version: z.string(),
   description: z.string(),
-  time_create: z.string().datetime({ offset: true })
+  time_create: z.iso.datetime({ offset: true })
 });
 
 const schemaVersionInput = z.strictObject({
diff --git a/rsconcept/frontend/src/features/oss/models/oss-api.ts b/rsconcept/frontend/src/features/oss/models/oss-api.ts
index df3ae5da..2c57c568 100644
--- a/rsconcept/frontend/src/features/oss/models/oss-api.ts
+++ b/rsconcept/frontend/src/features/oss/models/oss-api.ts
@@ -175,7 +175,11 @@ export class SubstitutionValidator {
       if (!original || !substitution) {
         return this.reportError(SubstitutionErrorType.invalidIDs, []);
       }
-      if (original.parse.status === ParsingStatus.INCORRECT || substitution.parse.status === ParsingStatus.INCORRECT) {
+      if (
+        substitution.parse &&
+        original.parse &&
+        (original.parse.status === ParsingStatus.INCORRECT || substitution.parse.status === ParsingStatus.INCORRECT)
+      ) {
         return this.reportError(SubstitutionErrorType.incorrectCst, [substitution.alias, original.alias]);
       }
       switch (substitution.cst_type) {
@@ -247,6 +251,9 @@ export class SubstitutionValidator {
           continue;
         }
         graph.addNode(cst.id);
+        if (!cst.parse) {
+          continue;
+        }
         const parents = extractGlobals(cst.parse.typification);
         for (const arg of cst.parse.args) {
           for (const alias of extractGlobals(arg.typification)) {
@@ -299,6 +306,13 @@ export class SubstitutionValidator {
         }
       }
 
+      if (!!original.parse !== !!substitution.parse) {
+        return this.reportError(SubstitutionErrorType.unequalTypification, [substitution.alias, original.alias]);
+      }
+      if (!original.parse || !substitution.parse) {
+        continue;
+      }
+
       const originalType = applyTypificationMapping(
         applyAliasMapping(original.parse.typification, baseMappings.get(original.schema)!),
         typeMappings
@@ -365,7 +379,7 @@ export class SubstitutionValidator {
 
       const substitution = this.cstByID.get(item.substitution)!;
       let substitutionText = '';
-      if (substitution.cst_type === original.cst_type) {
+      if (substitution.cst_type === original.cst_type || !substitution.parse) {
         substitutionText = baseMappings.get(substitution.schema)![substitution.alias];
       } else {
         substitutionText = applyAliasMapping(substitution.parse.typification, baseMappings.get(substitution.schema)!);
diff --git a/rsconcept/frontend/src/features/oss/pages/oss-page/editor-oss-graph/side-panel/toolbar-schema.tsx b/rsconcept/frontend/src/features/oss/pages/oss-page/editor-oss-graph/side-panel/toolbar-schema.tsx
index 15a9c056..67d25681 100644
--- a/rsconcept/frontend/src/features/oss/pages/oss-page/editor-oss-graph/side-panel/toolbar-schema.tsx
+++ b/rsconcept/frontend/src/features/oss/pages/oss-page/editor-oss-graph/side-panel/toolbar-schema.tsx
@@ -181,11 +181,13 @@ export function ToolbarSchema({
   }
 
   function handleShowTypeGraph() {
-    const typeInfo = schema.items.map(item => ({
-      alias: item.alias,
-      result: item.parse.typification,
-      args: item.parse.args
-    }));
+    const typeInfo = schema.items
+      .filter(item => !!item.parse)
+      .map(item => ({
+        alias: item.alias,
+        result: item.parse!.typification,
+        args: item.parse!.args
+      }));
     showTypeGraph({ items: typeInfo });
   }
 
diff --git a/rsconcept/frontend/src/features/rsform/backend/rsform-loader.ts b/rsconcept/frontend/src/features/rsform/backend/rsform-loader.ts
index 50f5eae5..a1420c2a 100644
--- a/rsconcept/frontend/src/features/rsform/backend/rsform-loader.ts
+++ b/rsconcept/frontend/src/features/rsform/backend/rsform-loader.ts
@@ -5,7 +5,7 @@
 import { Graph } from '@/models/graph';
 import { type RO } from '@/utils/meta';
 
-import { type IConstituenta, type IRSForm, type IRSFormStats } from '../models/rsform';
+import { ExpressionStatus, type IConstituenta, type IRSForm, type IRSFormStats } from '../models/rsform';
 import { inferClass, inferStatus, inferTemplate, isBaseSet, isFunctional } from '../models/rsform-api';
 import { extractGlobals, isSimpleExpression, splitTemplateDefinition } from '../models/rslang-api';
 
@@ -25,7 +25,7 @@ export class RSFormLoader {
   private cstByID = new Map<number, IConstituenta>();
 
   constructor(input: RO<IRSFormDTO>) {
-    this.schema = structuredClone(input) as IRSForm;
+    this.schema = structuredClone(input) as unknown as IRSForm;
     this.schema.version = input.version ?? 'latest';
   }
 
@@ -79,7 +79,7 @@ export class RSFormLoader {
     order.forEach(cstID => {
       const cst = this.cstByID.get(cstID)!;
       cst.schema = this.schema.id;
-      cst.status = inferStatus(cst.parse.status, cst.parse.valueClass);
+      cst.status = cst.parse ? inferStatus(cst.parse.status, cst.parse.valueClass) : ExpressionStatus.UNKNOWN;
       cst.is_template = inferTemplate(cst.definition_formal);
       cst.cst_class = inferClass(cst.cst_type, cst.is_template);
       cst.spawn = [];
@@ -184,11 +184,20 @@ export class RSFormLoader {
     return {
       count_all: items.length,
       count_crucial: items.reduce((sum, cst) => sum + (cst.crucial ? 1 : 0), 0),
-      count_errors: items.reduce((sum, cst) => sum + (cst.parse.status === ParsingStatus.INCORRECT ? 1 : 0), 0),
-      count_property: items.reduce((sum, cst) => sum + (cst.parse.valueClass === ValueClass.PROPERTY ? 1 : 0), 0),
+      count_errors: items.reduce(
+        (sum, cst) => sum + (cst.parse && cst.parse.status === ParsingStatus.INCORRECT ? 1 : 0),
+        0
+      ),
+      count_property: items.reduce(
+        (sum, cst) => sum + (cst.parse && cst.parse.valueClass === ValueClass.PROPERTY ? 1 : 0),
+        0
+      ),
       count_incalculable: items.reduce(
         (sum, cst) =>
-          sum + (cst.parse.status === ParsingStatus.VERIFIED && cst.parse.valueClass === ValueClass.INVALID ? 1 : 0),
+          sum +
+          (cst.parse && cst.parse.status === ParsingStatus.VERIFIED && cst.parse.valueClass === ValueClass.INVALID
+            ? 1
+            : 0),
         0
       ),
       count_inherited: items.reduce((sum, cst) => sum + (cst.is_inherited ? 1 : 0), 0),
@@ -204,7 +213,8 @@ export class RSFormLoader {
       count_term: items.reduce((sum, cst) => sum + (cst.cst_type === CstType.TERM ? 1 : 0), 0),
       count_function: items.reduce((sum, cst) => sum + (cst.cst_type === CstType.FUNCTION ? 1 : 0), 0),
       count_predicate: items.reduce((sum, cst) => sum + (cst.cst_type === CstType.PREDICATE ? 1 : 0), 0),
-      count_theorem: items.reduce((sum, cst) => sum + (cst.cst_type === CstType.THEOREM ? 1 : 0), 0)
+      count_theorem: items.reduce((sum, cst) => sum + (cst.cst_type === CstType.THEOREM ? 1 : 0), 0),
+      count_nominal: items.reduce((sum, cst) => sum + (cst.cst_type === CstType.NOMINAL ? 1 : 0), 0)
     };
   }
 }
diff --git a/rsconcept/frontend/src/features/rsform/backend/types.ts b/rsconcept/frontend/src/features/rsform/backend/types.ts
index 80f477a7..073154a0 100644
--- a/rsconcept/frontend/src/features/rsform/backend/types.ts
+++ b/rsconcept/frontend/src/features/rsform/backend/types.ts
@@ -7,6 +7,7 @@ import { errorMsg } from '@/utils/labels';
 
 /** Represents {@link IConstituenta} type. */
 export const CstType = {
+  NOMINAL: 'nominal',
   BASE: 'basic',
   STRUCTURED: 'structure',
   TERM: 'term',
@@ -276,7 +277,7 @@ export const schemaTokenID = z.enum(TokenID);
 export const schemaRSErrorType = z.enum(RSErrorType);
 
 export const schemaConstituentaBasics = z.strictObject({
-  id: z.coerce.number(),
+  id: z.number(),
   alias: z.string().nonempty(errorMsg.requiredField),
   convention: z.string(),
   crucial: z.boolean(),
@@ -290,31 +291,34 @@ export const schemaConstituentaBasics = z.strictObject({
 });
 
 export const schemaConstituenta = schemaConstituentaBasics.extend({
-  parse: z.strictObject({
-    status: schemaParsingStatus,
-    valueClass: schemaValueClass,
-    typification: z.string(),
-    syntaxTree: z.string(),
-    args: z.array(z.strictObject({ alias: z.string(), typification: z.string() }))
-  })
+  parse: z
+    .strictObject({
+      status: schemaParsingStatus,
+      valueClass: schemaValueClass,
+      typification: z.string(),
+      syntaxTree: z.string(),
+      args: z.array(z.strictObject({ alias: z.string(), typification: z.string() }))
+    })
+    .optional()
 });
 
 export const schemaRSForm = schemaLibraryItem.extend({
-  editors: z.array(z.coerce.number()),
+  editors: z.array(z.number()),
 
-  version: z.coerce.number().optional(),
+  version: z.number().optional(),
   versions: z.array(schemaVersionInfo),
 
   items: z.array(schemaConstituenta),
+  association: z.array(z.strictObject({ container: z.number(), associate: z.number() })),
   inheritance: z.array(
     z.strictObject({
-      child: z.coerce.number(),
-      child_source: z.coerce.number(),
-      parent: z.coerce.number(),
-      parent_source: z.coerce.number()
+      child: z.number(),
+      child_source: z.number(),
+      parent: z.number(),
+      parent_source: z.number()
     })
   ),
-  oss: z.array(z.strictObject({ id: z.coerce.number(), alias: z.string() }))
+  oss: z.array(z.strictObject({ id: z.number(), alias: z.string() }))
 });
 
 export const schemaVersionCreatedResponse = z.strictObject({
diff --git a/rsconcept/frontend/src/features/rsform/colors.ts b/rsconcept/frontend/src/features/rsform/colors.ts
index 505d8ba5..7c01d555 100644
--- a/rsconcept/frontend/src/features/rsform/colors.ts
+++ b/rsconcept/frontend/src/features/rsform/colors.ts
@@ -196,6 +196,7 @@ export function colorFgCstStatus(status: ExpressionStatus): string {
 export function colorBgCstClass(cstClass: CstClass): string {
   // prettier-ignore
   switch (cstClass) {
+    case CstClass.NOMINAL: return APP_COLORS.bgOrange;
     case CstClass.BASIC: return APP_COLORS.bgGreen;
     case CstClass.DERIVED: return APP_COLORS.bgBlue;
     case CstClass.STATEMENT: return APP_COLORS.bgRed;
@@ -203,6 +204,15 @@ export function colorBgCstClass(cstClass: CstClass): string {
   }
 }
 
+/** Determines background color for {@link IConstituenta} badge. */
+export function colorBgBadge(item: IConstituenta) {
+  switch (item.cst_class) {
+    case CstClass.BASIC:
+      return 'bg-accent-green25';
+  }
+  return 'bg-input';
+}
+
 /** Determines background color for {@link IConstituenta} depending on its parent schema index. */
 export function colorBgSchemas(schema_index: number): string {
   if (schema_index === 0) {
diff --git a/rsconcept/frontend/src/features/rsform/components/badge-constituenta.tsx b/rsconcept/frontend/src/features/rsform/components/badge-constituenta.tsx
index 2370d229..871f8a84 100644
--- a/rsconcept/frontend/src/features/rsform/components/badge-constituenta.tsx
+++ b/rsconcept/frontend/src/features/rsform/components/badge-constituenta.tsx
@@ -4,8 +4,8 @@ import clsx from 'clsx';
 
 import { globalIDs } from '@/utils/constants';
 
-import { colorFgCstStatus } from '../colors';
-import { CstClass, type IConstituenta } from '../models/rsform';
+import { colorBgBadge, colorFgCstStatus } from '../colors';
+import { type IConstituenta } from '../models/rsform';
 import { useCstTooltipStore } from '../stores/cst-tooltip';
 
 interface BadgeConstituentaProps {
@@ -29,7 +29,7 @@ export function BadgeConstituenta({ value, prefixID }: BadgeConstituentaProps) {
         'cc-badge-constituenta',
         value.is_inherited && 'border-dashed',
         value.crucial && 'cc-badge-inner-shadow',
-        value.cst_class === CstClass.BASIC ? 'bg-accent-green25' : 'bg-input'
+        colorBgBadge(value)
       )}
       style={{
         borderColor: colorFgCstStatus(value.status),
diff --git a/rsconcept/frontend/src/features/rsform/components/icon-cst-type.tsx b/rsconcept/frontend/src/features/rsform/components/icon-cst-type.tsx
index ab2448b3..2aef51fe 100644
--- a/rsconcept/frontend/src/features/rsform/components/icon-cst-type.tsx
+++ b/rsconcept/frontend/src/features/rsform/components/icon-cst-type.tsx
@@ -1,4 +1,4 @@
-import { type DomIconProps } from '@/components/icons';
+import { type DomIconProps, IconCstNominal } from '@/components/icons';
 import {
   IconCstAxiom,
   IconCstBaseSet,
@@ -15,6 +15,8 @@ import { CstType } from '../backend/types';
 /** Icon for constituenta type. */
 export function IconCstType({ value, size = '1.25rem', className }: DomIconProps<CstType>) {
   switch (value) {
+    case CstType.NOMINAL:
+      return <IconCstNominal size={size} className={className ?? 'text-primary'} />;
     case CstType.BASE:
       return <IconCstBaseSet size={size} className={className ?? 'text-constructive'} />;
     case CstType.CONSTANT:
diff --git a/rsconcept/frontend/src/features/rsform/components/info-constituenta.tsx b/rsconcept/frontend/src/features/rsform/components/info-constituenta.tsx
index e89d0e68..b6a6c5de 100644
--- a/rsconcept/frontend/src/features/rsform/components/info-constituenta.tsx
+++ b/rsconcept/frontend/src/features/rsform/components/info-constituenta.tsx
@@ -23,10 +23,12 @@ export function InfoConstituenta({ data, className, ...restProps }: InfoConstitu
           {data.term_resolved || data.term_raw}
         </p>
       ) : null}
-      <p className='break-all'>
-        <b>Типизация: </b>
-        <span className='font-math'>{labelCstTypification(data)}</span>
-      </p>
+      {data.parse ? (
+        <p className='break-all'>
+          <b>Типизация: </b>
+          <span className='font-math'>{labelCstTypification(data)}</span>
+        </p>
+      ) : null}
       {data.definition_formal ? (
         <p className='break-all'>
           <b>Выражение: </b>
diff --git a/rsconcept/frontend/src/features/rsform/components/rsform-stats.tsx b/rsconcept/frontend/src/features/rsform/components/rsform-stats.tsx
index 1b89d0ee..ca3ce6ae 100644
--- a/rsconcept/frontend/src/features/rsform/components/rsform-stats.tsx
+++ b/rsconcept/frontend/src/features/rsform/components/rsform-stats.tsx
@@ -6,6 +6,7 @@ import {
   IconCstBaseSet,
   IconCstConstSet,
   IconCstFunction,
+  IconCstNominal,
   IconCstPredicate,
   IconCstStructured,
   IconCstTerm,
@@ -14,7 +15,6 @@ import {
   IconPredecessor,
   IconStatusError,
   IconStatusIncalculable,
-  IconStatusOK,
   IconStatusProperty,
   IconTerminology
 } from '@/components/icons';
@@ -48,18 +48,11 @@ export function RSFormStats({ className, stats }: RSFormStatsProps) {
         titleHtml='Наследованные'
       />
 
-      <ValueStats
-        id='count_ok'
-        title='Корректные'
-        className='col-start-1'
-        icon={<IconStatusOK size='1.25rem' />}
-        value={stats.count_all - stats.count_errors - stats.count_property - stats.count_incalculable}
-      />
       <ValueStats
         id='count_property'
         title='Неразмерные'
         icon={<IconStatusProperty size='1.25rem' />}
-        value={stats.count_errors}
+        value={stats.count_property}
       />
       <ValueStats
         id='count_incalculable'
@@ -73,6 +66,12 @@ export function RSFormStats({ className, stats }: RSFormStatsProps) {
         icon={<IconStatusError size='1.25rem' className={stats.count_errors > 0 ? 'text-destructive' : undefined} />}
         value={stats.count_errors}
       />
+      <ValueStats
+        id='count_nominal'
+        title='Номеноиды'
+        icon={<IconCstNominal size='1.25rem' className={stats.count_nominal > 0 ? 'text-destructive' : undefined} />}
+        value={stats.count_nominal}
+      />
 
       <ValueStats
         id='count_base'
diff --git a/rsconcept/frontend/src/features/rsform/components/term-graph/graph/tg-node.tsx b/rsconcept/frontend/src/features/rsform/components/term-graph/graph/tg-node.tsx
index 3c738fc5..dc87021e 100644
--- a/rsconcept/frontend/src/features/rsform/components/term-graph/graph/tg-node.tsx
+++ b/rsconcept/frontend/src/features/rsform/components/term-graph/graph/tg-node.tsx
@@ -75,7 +75,7 @@ function describeCstNode(cst: IConstituenta) {
     ? cst.convention
     : cst.definition_resolved || cst.definition_formal || cst.convention;
   const typification = labelCstTypification(cst);
-  return `${cst.alias}: ${cst.term_resolved}</br><b>Типизация:</b> ${typification}</br><b>Содержание:</b> ${
-    contents ? contents : 'отсутствует'
-  }`;
+  return `${cst.alias}: ${cst.term_resolved}</br>${
+    cst.parse ? `<b>Типизация:</b> ${typification}</br>` : ''
+  }<b>Содержание:</b> ${contents ? contents : 'отсутствует'}`;
 }
diff --git a/rsconcept/frontend/src/features/rsform/dialogs/dlg-create-cst/form-create-cst.tsx b/rsconcept/frontend/src/features/rsform/dialogs/dlg-create-cst/form-create-cst.tsx
index b81e6337..3180f153 100644
--- a/rsconcept/frontend/src/features/rsform/dialogs/dlg-create-cst/form-create-cst.tsx
+++ b/rsconcept/frontend/src/features/rsform/dialogs/dlg-create-cst/form-create-cst.tsx
@@ -13,9 +13,9 @@ import { CstType, type ICreateConstituentaDTO } from '../../backend/types';
 import { IconCrucialValue } from '../../components/icon-crucial-value';
 import { RSInput } from '../../components/rs-input';
 import { SelectCstType } from '../../components/select-cst-type';
-import { getRSDefinitionPlaceholder } from '../../labels';
+import { getRSDefinitionPlaceholder, labelRSExpression } from '../../labels';
 import { type IRSForm } from '../../models/rsform';
-import { generateAlias, isBaseSet, isBasicConcept, isFunctional } from '../../models/rsform-api';
+import { generateAlias, isBaseSet, isBasicConcept } from '../../models/rsform-api';
 
 interface FormCreateCstProps {
   schema: IRSForm;
@@ -33,9 +33,8 @@ export function FormCreateCst({ schema }: FormCreateCstProps) {
   const cst_type = useWatch({ control, name: 'cst_type' });
   const convention = useWatch({ control, name: 'convention' });
   const crucial = useWatch({ control, name: 'crucial' });
-  const isBasic = isBasicConcept(cst_type);
+  const isBasic = isBasicConcept(cst_type) || cst_type === CstType.NOMINAL;
   const isElementary = isBaseSet(cst_type);
-  const isFunction = isFunctional(cst_type);
   const showConvention = !!convention || forceComment || isBasic;
 
   function handleTypeChange(target: CstType) {
@@ -91,13 +90,7 @@ export function FormCreateCst({ schema }: FormCreateCstProps) {
             <RSInput
               id='dlg_cst_expression'
               noTooltip
-              label={
-                cst_type === CstType.STRUCTURED
-                  ? 'Область определения'
-                  : isFunction
-                  ? 'Определение функции'
-                  : 'Формальное определение'
-              }
+              label={labelRSExpression(cst_type)}
               placeholder={getRSDefinitionPlaceholder(cst_type)}
               value={field.value}
               onChange={field.onChange}
diff --git a/rsconcept/frontend/src/features/rsform/dialogs/dlg-cst-template/template-state.tsx b/rsconcept/frontend/src/features/rsform/dialogs/dlg-cst-template/template-state.tsx
index e63d31db..52222e16 100644
--- a/rsconcept/frontend/src/features/rsform/dialogs/dlg-cst-template/template-state.tsx
+++ b/rsconcept/frontend/src/features/rsform/dialogs/dlg-cst-template/template-state.tsx
@@ -37,7 +37,7 @@ export const TemplateState = ({ children }: React.PropsWithChildren) => {
   function onChangePrototype(newPrototype: IConstituenta) {
     setPrototype(newPrototype);
     setArguments(
-      newPrototype.parse.args.map(arg => ({
+      newPrototype.parse!.args.map(arg => ({
         alias: arg.alias,
         typification: arg.typification,
         value: ''
diff --git a/rsconcept/frontend/src/features/rsform/dialogs/dlg-edit-cst/form-edit-cst.tsx b/rsconcept/frontend/src/features/rsform/dialogs/dlg-edit-cst/form-edit-cst.tsx
index c9fa3d73..a00b955e 100644
--- a/rsconcept/frontend/src/features/rsform/dialogs/dlg-edit-cst/form-edit-cst.tsx
+++ b/rsconcept/frontend/src/features/rsform/dialogs/dlg-edit-cst/form-edit-cst.tsx
@@ -1,6 +1,9 @@
 import { useState } from 'react';
 import { Controller, useFormContext, useWatch } from 'react-hook-form';
 
+import { HelpTopic } from '@/features/help';
+import { BadgeHelp } from '@/features/help/components/badge-help';
+
 import { MiniButton } from '@/components/control';
 import { TextArea, TextInput } from '@/components/input';
 
@@ -8,9 +11,9 @@ import { CstType, type IUpdateConstituentaDTO } from '../../backend/types';
 import { IconCrucialValue } from '../../components/icon-crucial-value';
 import { RSInput } from '../../components/rs-input';
 import { SelectCstType } from '../../components/select-cst-type';
-import { getRSDefinitionPlaceholder, labelCstTypification } from '../../labels';
+import { getRSDefinitionPlaceholder, labelCstTypification, labelRSExpression } from '../../labels';
 import { type IConstituenta, type IRSForm } from '../../models/rsform';
-import { generateAlias, isBaseSet, isBasicConcept, isFunctional } from '../../models/rsform-api';
+import { generateAlias, isBaseSet, isBasicConcept } from '../../models/rsform-api';
 
 interface FormEditCstProps {
   schema: IRSForm;
@@ -30,9 +33,8 @@ export function FormEditCst({ target, schema }: FormEditCstProps) {
   const cst_type = useWatch({ control, name: 'item_data.cst_type' }) ?? CstType.BASE;
   const convention = useWatch({ control, name: 'item_data.convention' });
   const crucial = useWatch({ control, name: 'item_data.crucial' }) ?? false;
-  const isBasic = isBasicConcept(cst_type);
+  const isBasic = isBasicConcept(cst_type) || cst_type === CstType.NOMINAL;
   const isElementary = isBaseSet(cst_type);
-  const isFunction = isFunctional(cst_type);
   const showConvention = !!convention || forceComment || isBasic;
 
   function handleTypeChange(newValue: CstType) {
@@ -67,6 +69,7 @@ export function FormEditCst({ target, schema }: FormEditCstProps) {
           {...register('item_data.alias')}
           error={errors.item_data?.alias}
         />
+        <BadgeHelp topic={HelpTopic.CC_CONSTITUENTA} offset={16} contentClass='sm:max-w-160' />
       </div>
 
       <TextArea
@@ -75,23 +78,26 @@ export function FormEditCst({ target, schema }: FormEditCstProps) {
         spellCheck
         label='Термин'
         className='max-h-15 disabled:min-h-9'
+        placeholder='Обозначение для текстовых определений'
         {...register('item_data.term_raw')}
         error={errors.item_data?.term_raw}
       />
 
-      <TextArea
-        id='cst_typification'
-        fitContent
-        dense
-        noResize
-        noBorder
-        noOutline
-        transparent
-        readOnly
-        label='Типизация'
-        value={labelCstTypification(target)}
-        className='cursor-default'
-      />
+      {cst_type !== CstType.NOMINAL ? (
+        <TextArea
+          id='cst_typification'
+          fitContent
+          dense
+          noResize
+          noBorder
+          noOutline
+          transparent
+          readOnly
+          label='Типизация'
+          value={labelCstTypification(target)}
+          className='cursor-default'
+        />
+      ) : null}
 
       <Controller
         control={control}
@@ -101,13 +107,7 @@ export function FormEditCst({ target, schema }: FormEditCstProps) {
             <RSInput
               id='dlg_cst_expression'
               noTooltip
-              label={
-                cst_type === CstType.STRUCTURED
-                  ? 'Область определения'
-                  : isFunction
-                  ? 'Определение функции'
-                  : 'Формальное определение'
-              }
+              label={labelRSExpression(cst_type)}
               placeholder={getRSDefinitionPlaceholder(cst_type)}
               className='max-h-15'
               schema={schema}
@@ -131,6 +131,7 @@ export function FormEditCst({ target, schema }: FormEditCstProps) {
               fitContent
               spellCheck
               label='Текстовое определение'
+              placeholder='Текстовая интерпретация формального выражения'
               className='max-h-15'
               value={field.value}
               onChange={field.onChange}
@@ -158,6 +159,7 @@ export function FormEditCst({ target, schema }: FormEditCstProps) {
           fitContent
           spellCheck
           label={isBasic ? 'Конвенция' : 'Комментарий'}
+          placeholder={isBasic ? 'Договоренность об интерпретации' : 'Пояснение разработчика'}
           className='max-h-20 disabled:min-h-9'
           {...register('item_data.convention')}
           error={errors.item_data?.convention}
diff --git a/rsconcept/frontend/src/features/rsform/dialogs/dlg-graph-params.tsx b/rsconcept/frontend/src/features/rsform/dialogs/dlg-graph-params.tsx
index 727218ad..ab1fb34a 100644
--- a/rsconcept/frontend/src/features/rsform/dialogs/dlg-graph-params.tsx
+++ b/rsconcept/frontend/src/features/rsform/dialogs/dlg-graph-params.tsx
@@ -2,12 +2,14 @@
 
 import { Controller, useForm } from 'react-hook-form';
 
+import { MiniButton } from '@/components/control';
 import { Checkbox } from '@/components/input';
 import { ModalForm } from '@/components/modal';
 
 import { CstType } from '../backend/types';
+import { IconCstType } from '../components/icon-cst-type';
 import { labelCstType } from '../labels';
-import { type GraphFilterParams, useTermGraphStore } from '../stores/term-graph';
+import { cstTypeToFilterKey, type GraphFilterParams, useTermGraphStore } from '../stores/term-graph';
 
 export function DlgGraphParams() {
   const params = useTermGraphStore(state => state.filter);
@@ -71,47 +73,32 @@ export function DlgGraphParams() {
         />
       </div>
       <div className='flex flex-col gap-1'>
-        <h1 className='mb-2'>Типы конституент</h1>
-        <Controller
-          control={control}
-          name='allowBase'
-          render={({ field }) => <Checkbox {...field} label={labelCstType(CstType.BASE)} />}
-        />
-        <Controller
-          control={control}
-          name='allowStruct'
-          render={({ field }) => <Checkbox {...field} label={labelCstType(CstType.STRUCTURED)} />}
-        />
-        <Controller
-          control={control}
-          name='allowTerm'
-          render={({ field }) => <Checkbox {...field} label={labelCstType(CstType.TERM)} />}
-        />
-        <Controller
-          control={control}
-          name='allowAxiom'
-          render={({ field }) => <Checkbox {...field} label={labelCstType(CstType.AXIOM)} />}
-        />
-        <Controller
-          control={control}
-          name='allowFunction'
-          render={({ field }) => <Checkbox {...field} label={labelCstType(CstType.FUNCTION)} />}
-        />
-        <Controller
-          control={control}
-          name='allowPredicate'
-          render={({ field }) => <Checkbox {...field} label={labelCstType(CstType.PREDICATE)} />}
-        />
-        <Controller
-          control={control}
-          name='allowConstant'
-          render={({ field }) => <Checkbox {...field} label={labelCstType(CstType.CONSTANT)} />}
-        />
-        <Controller
-          control={control}
-          name='allowTheorem'
-          render={({ field }) => <Checkbox {...field} label={labelCstType(CstType.THEOREM)} />}
-        />
+        <h1 className='mb-1'>Типы конституент</h1>
+        <div>
+          {Object.values(CstType).map(cstType => {
+            const fieldName = cstTypeToFilterKey[cstType];
+            return (
+              <Controller
+                key={fieldName}
+                control={control}
+                name={fieldName}
+                render={({ field }) => (
+                  <MiniButton
+                    onClick={() => field.onChange(!field.value)}
+                    title={labelCstType(cstType)}
+                    icon={
+                      <IconCstType
+                        size='2rem'
+                        value={cstType}
+                        className={field.value ? 'text-constructive' : 'text-destructive'}
+                      />
+                    }
+                  />
+                )}
+              />
+            );
+          })}
+        </div>
       </div>
     </ModalForm>
   );
diff --git a/rsconcept/frontend/src/features/rsform/labels.ts b/rsconcept/frontend/src/features/rsform/labels.ts
index e79f44a2..475db24e 100644
--- a/rsconcept/frontend/src/features/rsform/labels.ts
+++ b/rsconcept/frontend/src/features/rsform/labels.ts
@@ -18,6 +18,7 @@ import { type GraphColoring } from './stores/term-graph';
 
 // --- Records for label/describe functions ---
 const labelCstTypeRecord: Record<CstType, string> = {
+  [CstType.NOMINAL]: 'Номеноид',
   [CstType.BASE]: 'Базисное множество',
   [CstType.CONSTANT]: 'Константное множество',
   [CstType.STRUCTURED]: 'Родовая структура',
@@ -34,6 +35,7 @@ const labelReferenceTypeRecord: Record<ReferenceType, string> = {
 };
 
 const labelCstClassRecord: Record<CstClass, string> = {
+  [CstClass.NOMINAL]: 'номинальный',
   [CstClass.BASIC]: 'базовый',
   [CstClass.DERIVED]: 'производный',
   [CstClass.STATEMENT]: 'утверждение',
@@ -41,6 +43,7 @@ const labelCstClassRecord: Record<CstClass, string> = {
 };
 
 const describeCstClassRecord: Record<CstClass, string> = {
+  [CstClass.NOMINAL]: 'номинальная сущность',
   [CstClass.BASIC]: 'неопределяемое понятие',
   [CstClass.DERIVED]: 'определяемое понятие',
   [CstClass.STATEMENT]: 'логическое утверждение',
@@ -158,15 +161,28 @@ const labelGrammemeRecord: Partial<Record<Grammeme, string>> = {
   [Grammeme.Litr]: 'Стиль: литературный'
 };
 
+const labelRSExpressionsRecord: Record<CstType, string> = {
+  [CstType.NOMINAL]: 'Определяющие конституенты',
+  [CstType.BASE]: 'Формальное определение',
+  [CstType.CONSTANT]: 'Формальное определение',
+  [CstType.STRUCTURED]: 'Область определения',
+  [CstType.TERM]: 'Формальное определение',
+  [CstType.THEOREM]: 'Формальное определение',
+  [CstType.AXIOM]: 'Формальное определение',
+  [CstType.FUNCTION]: 'Определение функции',
+  [CstType.PREDICATE]: 'Определение функции'
+};
+
 const rsDefinitionPlaceholderRecord: Record<CstType, string> = {
+  [CstType.NOMINAL]: 'Например, X1 D1 N1',
+  [CstType.BASE]: 'Не предусмотрено',
+  [CstType.CONSTANT]: 'Не предусмотрено',
   [CstType.STRUCTURED]: 'Пример: ℬ(X1×D2)',
   [CstType.TERM]: 'Пример: D{ξ∈S1 | Pr1(ξ)∩Pr2(ξ)=∅}',
   [CstType.THEOREM]: 'Пример: D11=∅',
   [CstType.AXIOM]: 'Пример: D11=∅',
   [CstType.FUNCTION]: 'Пример: [α∈X1, β∈ℬ(X1×X2)] Pr2(Fi1[{α}](β))',
-  [CstType.PREDICATE]: 'Пример: [α∈X1, β∈ℬ(X1)] α∈β & card(β)>1',
-  [CstType.CONSTANT]: 'Формальное выражение',
-  [CstType.BASE]: 'Формальное выражение'
+  [CstType.PREDICATE]: 'Пример: [α∈X1, β∈ℬ(X1)] α∈β & card(β)>1'
 };
 
 const cstTypeShortcutKeyRecord: Record<CstType, string> = {
@@ -177,7 +193,8 @@ const cstTypeShortcutKeyRecord: Record<CstType, string> = {
   [CstType.FUNCTION]: 'Q',
   [CstType.PREDICATE]: 'W',
   [CstType.CONSTANT]: '5',
-  [CstType.THEOREM]: '6'
+  [CstType.THEOREM]: '6',
+  [CstType.NOMINAL]: '7'
 };
 
 const labelTokenRecord: Partial<Record<TokenID, string>> = {
@@ -331,6 +348,11 @@ export function getCstTypeShortcut(type: CstType) {
   return key ? `${labelCstType(type)} [Alt + ${key}]` : labelCstType(type);
 }
 
+/** Generates label for RS expression based on {@link CstType}. */
+export function labelRSExpression(type: CstType): string {
+  return labelRSExpressionsRecord[type] ?? 'Формальное выражение';
+}
+
 /** Generates placeholder for RS definition based on {@link CstType}. */
 export function getRSDefinitionPlaceholder(type: CstType): string {
   return rsDefinitionPlaceholderRecord[type] ?? 'Формальное выражение';
@@ -445,6 +467,9 @@ export function labelTypification({
  * Generates label for {@link IConstituenta} typification.
  */
 export function labelCstTypification(cst: RO<IConstituenta>): string {
+  if (!cst.parse) {
+    return 'N/A';
+  }
   return labelTypification({
     isValid: cst.parse.status === ParsingStatus.VERIFIED,
     resultType: cst.parse.typification,
diff --git a/rsconcept/frontend/src/features/rsform/models/graph-api.ts b/rsconcept/frontend/src/features/rsform/models/graph-api.ts
index 047fa03a..17123f92 100644
--- a/rsconcept/frontend/src/features/rsform/models/graph-api.ts
+++ b/rsconcept/frontend/src/features/rsform/models/graph-api.ts
@@ -69,6 +69,7 @@ export function produceFilteredGraph(schema: IRSForm, params: GraphFilterParams,
     if (params.allowPredicate) result.push(CstType.PREDICATE);
     if (params.allowConstant) result.push(CstType.CONSTANT);
     if (params.allowTheorem) result.push(CstType.THEOREM);
+    if (params.allowNominal) result.push(CstType.NOMINAL);
     return result;
   })();
 
diff --git a/rsconcept/frontend/src/features/rsform/models/rsform-api.ts b/rsconcept/frontend/src/features/rsform/models/rsform-api.ts
index fc4ea36b..072d9914 100644
--- a/rsconcept/frontend/src/features/rsform/models/rsform-api.ts
+++ b/rsconcept/frontend/src/features/rsform/models/rsform-api.ts
@@ -95,6 +95,7 @@ export function inferClass(type: CstType, isTemplate: boolean = false): CstClass
   }
   // prettier-ignore
   switch (type) {
+    case CstType.NOMINAL:     return CstClass.NOMINAL;
     case CstType.BASE:        return CstClass.BASIC;
     case CstType.CONSTANT:    return CstClass.BASIC;
     case CstType.STRUCTURED:  return CstClass.BASIC;
@@ -124,6 +125,7 @@ export function applyFilterCategory(start: IConstituenta, schema: IRSForm): ICon
 }
 
 const cstTypePrefixRecord: Record<CstType, string> = {
+  [CstType.NOMINAL]: 'N',
   [CstType.BASE]: 'X',
   [CstType.CONSTANT]: 'C',
   [CstType.STRUCTURED]: 'S',
@@ -148,6 +150,7 @@ export function guessCstType(hint: string, defaultType: CstType = CstType.TERM):
   }
   // prettier-ignore
   switch (hint) {
+    case 'N': return CstType.NOMINAL;
     case 'X': return CstType.BASE;
     case 'C': return CstType.CONSTANT;
     case 'S': return CstType.STRUCTURED;
@@ -166,6 +169,7 @@ export function guessCstType(hint: string, defaultType: CstType = CstType.TERM):
 export function isBasicConcept(type: CstType): boolean {
   // prettier-ignore
   switch (type) {
+    case CstType.NOMINAL: return true;
     case CstType.BASE: return true;
     case CstType.CONSTANT: return true;
     case CstType.STRUCTURED: return true;
@@ -183,6 +187,7 @@ export function isBasicConcept(type: CstType): boolean {
 export function isBaseSet(type: CstType): boolean {
   // prettier-ignore
   switch (type) {
+    case CstType.NOMINAL: return false;
     case CstType.BASE: return true;
     case CstType.CONSTANT: return true;
     case CstType.STRUCTURED: return false;
@@ -200,6 +205,7 @@ export function isBaseSet(type: CstType): boolean {
 export function isFunctional(type: CstType): boolean {
   // prettier-ignore
   switch (type) {
+    case CstType.NOMINAL: return false;
     case CstType.BASE: return false;
     case CstType.CONSTANT: return false;
     case CstType.STRUCTURED: return false;
@@ -215,7 +221,13 @@ export function isFunctional(type: CstType): boolean {
  * Evaluate if {@link IConstituenta} can be used produce structure.
  */
 export function canProduceStructure(cst: RO<IConstituenta>): boolean {
-  return !!cst.parse.typification && cst.cst_type !== CstType.BASE && cst.cst_type !== CstType.CONSTANT;
+  return (
+    !!cst.parse &&
+    !!cst.parse.typification &&
+    cst.cst_type !== CstType.BASE &&
+    cst.cst_type !== CstType.CONSTANT &&
+    cst.cst_type !== CstType.NOMINAL
+  );
 }
 
 /**
diff --git a/rsconcept/frontend/src/features/rsform/models/rsform.ts b/rsconcept/frontend/src/features/rsform/models/rsform.ts
index 9eda306c..75627c94 100644
--- a/rsconcept/frontend/src/features/rsform/models/rsform.ts
+++ b/rsconcept/frontend/src/features/rsform/models/rsform.ts
@@ -20,6 +20,7 @@ export const CATEGORY_CST_TYPE = CstType.THEOREM;
 
 /** Represents Constituenta classification in terms of system of concepts. */
 export const CstClass = {
+  NOMINAL: 'nominal',
   BASIC: 'basic',
   DERIVED: 'derived',
   STATEMENT: 'statement',
@@ -58,7 +59,7 @@ export interface IConstituenta {
   term_resolved: string;
   term_forms: TermForm[];
 
-  parse: {
+  parse?: {
     status: ParsingStatus;
     valueClass: ValueClass;
     typification: string;
@@ -122,6 +123,7 @@ export interface IRSFormStats {
   count_function: number;
   count_predicate: number;
   count_theorem: number;
+  count_nominal: number;
 }
 
 /** Represents inheritance data for {@link IRSForm}. */
diff --git a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-constituenta/form-constituenta.tsx b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-constituenta/form-constituenta.tsx
index 394886db..e3b3921c 100644
--- a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-constituenta/form-constituenta.tsx
+++ b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-constituenta/form-constituenta.tsx
@@ -30,9 +30,14 @@ import {
 import { useMutatingRSForm } from '../../../backend/use-mutating-rsform';
 import { useUpdateConstituenta } from '../../../backend/use-update-constituenta';
 import { RefsInput } from '../../../components/refs-input';
-import { getRSDefinitionPlaceholder, labelCstTypification, labelTypification } from '../../../labels';
+import {
+  getRSDefinitionPlaceholder,
+  labelCstTypification,
+  labelRSExpression,
+  labelTypification
+} from '../../../labels';
 import { type IConstituenta, type IRSForm } from '../../../models/rsform';
-import { isBaseSet, isBasicConcept, isFunctional } from '../../../models/rsform-api';
+import { isBaseSet, isBasicConcept } from '../../../models/rsform-api';
 import { EditorRSExpression } from '../editor-rsexpression';
 
 interface FormConstituentaProps {
@@ -90,15 +95,18 @@ export function FormConstituenta({ disabled, id, toggleReset, schema, activeCst,
   );
 
   const typeInfo = useMemo(
-    () => ({
-      alias: activeCst.alias,
-      result: localParse ? localParse.typification : activeCst.parse.typification,
-      args: localParse ? localParse.args : activeCst.parse.args
-    }),
+    () =>
+      activeCst.parse
+        ? {
+            alias: activeCst.alias,
+            result: localParse ? localParse.typification : activeCst.parse.typification,
+            args: localParse ? localParse.args : activeCst.parse.args
+          }
+        : null,
     [activeCst, localParse]
   );
 
-  const isBasic = isBasicConcept(activeCst.cst_type);
+  const isBasic = isBasicConcept(activeCst.cst_type) || activeCst.cst_type === CstType.NOMINAL;
   const isElementary = isBaseSet(activeCst.cst_type);
   const showConvention = !!activeCst.convention || forceComment || isBasic;
 
@@ -140,7 +148,11 @@ export function FormConstituenta({ disabled, id, toggleReset, schema, activeCst,
   }
 
   function handleTypeGraph(event: React.MouseEvent<Element>) {
-    if ((localParse && !localParse.parseResult) || activeCst.parse.status !== ParsingStatus.VERIFIED) {
+    if (
+      (localParse && !localParse.parseResult) ||
+      !activeCst.parse ||
+      activeCst.parse.status !== ParsingStatus.VERIFIED
+    ) {
       toast.error(errorMsg.typeStructureFailed);
       return;
     }
@@ -227,19 +239,21 @@ export function FormConstituenta({ disabled, id, toggleReset, schema, activeCst,
         )}
       />
 
-      <TextArea
-        id='cst_typification'
-        fitContent
-        dense
-        noResize
-        noBorder
-        noOutline
-        transparent
-        readOnly
-        label='Типизация'
-        value={typification}
-        className='cursor-default'
-      />
+      {activeCst.cst_type !== CstType.NOMINAL ? (
+        <TextArea
+          id='cst_typification'
+          fitContent
+          dense
+          noResize
+          noBorder
+          noOutline
+          transparent
+          readOnly
+          label='Типизация'
+          value={typification}
+          className='cursor-default'
+        />
+      ) : null}
 
       {!!activeCst.definition_formal || !isElementary ? (
         <Controller
@@ -248,13 +262,7 @@ export function FormConstituenta({ disabled, id, toggleReset, schema, activeCst,
           render={({ field }) => (
             <EditorRSExpression
               id='cst_expression'
-              label={
-                activeCst.cst_type === CstType.STRUCTURED
-                  ? 'Область определения'
-                  : isFunctional(activeCst.cst_type)
-                  ? 'Определение функции'
-                  : 'Формальное определение'
-              }
+              label={labelRSExpression(activeCst.cst_type)}
               placeholder={disabled ? '' : getRSDefinitionPlaceholder(activeCst.cst_type)}
               value={field.value ?? ''}
               activeCst={activeCst}
diff --git a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rsexpression/editor-rsexpression.tsx b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rsexpression/editor-rsexpression.tsx
index 3b2acaf7..821d9410 100644
--- a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rsexpression/editor-rsexpression.tsx
+++ b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rsexpression/editor-rsexpression.tsx
@@ -155,6 +155,21 @@ export function EditorRSExpression({
     }
   }
 
+  if (!activeCst.parse) {
+    return (
+      <RSInput
+        value={value}
+        schema={schema}
+        minHeight='3.75rem'
+        maxHeight='8rem'
+        onChange={handleChange}
+        onOpenEdit={onOpenEdit}
+        disabled={disabled}
+        {...restProps}
+      />
+    );
+  }
+
   return (
     <div className='relative'>
       <ToolbarRSExpression
diff --git a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rsexpression/status-bar.tsx b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rsexpression/status-bar.tsx
index 48cc320d..a4c3e119 100644
--- a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rsexpression/status-bar.tsx
+++ b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rsexpression/status-bar.tsx
@@ -30,7 +30,7 @@ interface StatusBarProps {
 
 export function StatusBar({ className, isModified, processing, activeCst, parseData, onAnalyze }: StatusBarProps) {
   const status = (() => {
-    if (isModified) {
+    if (isModified || !activeCst.parse) {
       return ExpressionStatus.UNKNOWN;
     }
     if (parseData) {
diff --git a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rslist/editor-rslist.tsx b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rslist/editor-rslist.tsx
index 1d6ab599..64e68169 100644
--- a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rslist/editor-rslist.tsx
+++ b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-rslist/editor-rslist.tsx
@@ -96,6 +96,7 @@ export function EditorRSList() {
       case 'KeyW':      createCst(CstType.PREDICATE, true); return true;
       case 'Digit5':    createCst(CstType.CONSTANT, true); return true;
       case 'Digit6':    createCst(CstType.THEOREM, true); return true;
+      case 'Digit7':    createCst(CstType.NOMINAL, true); return true;
     }
     return false;
   }
diff --git a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-term-graph/toolbar-term-graph.tsx b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-term-graph/toolbar-term-graph.tsx
index 1c0df580..2f92e227 100644
--- a/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-term-graph/toolbar-term-graph.tsx
+++ b/rsconcept/frontend/src/features/rsform/pages/rsform-page/editor-term-graph/toolbar-term-graph.tsx
@@ -63,11 +63,13 @@ export function ToolbarTermGraph({ className }: ToolbarTermGraphProps) {
   const { addSelectedNodes } = store.getState();
 
   function handleShowTypeGraph() {
-    const typeInfo = schema.items.map(item => ({
-      alias: item.alias,
-      result: item.parse.typification,
-      args: item.parse.args
-    }));
+    const typeInfo = schema.items
+      .filter(item => !!item.parse)
+      .map(item => ({
+        alias: item.alias,
+        result: item.parse!.typification,
+        args: item.parse!.args
+      }));
     showTypeGraph({ items: typeInfo });
   }
 
diff --git a/rsconcept/frontend/src/features/rsform/stores/term-graph.ts b/rsconcept/frontend/src/features/rsform/stores/term-graph.ts
index acdca33d..c67d0e7c 100644
--- a/rsconcept/frontend/src/features/rsform/stores/term-graph.ts
+++ b/rsconcept/frontend/src/features/rsform/stores/term-graph.ts
@@ -1,6 +1,8 @@
 import { create } from 'zustand';
 import { persist } from 'zustand/middleware';
 
+import { CstType } from '../backend/types';
+
 export const graphColorings = ['none', 'status', 'type', 'schemas'] as const;
 
 /**
@@ -29,8 +31,21 @@ export interface GraphFilterParams {
   allowPredicate: boolean;
   allowConstant: boolean;
   allowTheorem: boolean;
+  allowNominal: boolean;
 }
 
+export const cstTypeToFilterKey: Record<CstType, keyof GraphFilterParams> = {
+  [CstType.BASE]: 'allowBase',
+  [CstType.STRUCTURED]: 'allowStruct',
+  [CstType.TERM]: 'allowTerm',
+  [CstType.AXIOM]: 'allowAxiom',
+  [CstType.FUNCTION]: 'allowFunction',
+  [CstType.PREDICATE]: 'allowPredicate',
+  [CstType.CONSTANT]: 'allowConstant',
+  [CstType.THEOREM]: 'allowTheorem',
+  [CstType.NOMINAL]: 'allowNominal'
+};
+
 interface TermGraphStore {
   filter: GraphFilterParams;
   setFilter: (value: GraphFilterParams) => void;
@@ -66,7 +81,8 @@ export const useTermGraphStore = create<TermGraphStore>()(
         allowFunction: true,
         allowPredicate: true,
         allowConstant: true,
-        allowTheorem: true
+        allowTheorem: true,
+        allowNominal: true
       },
       setFilter: value => set({ filter: value }),
       toggleFocusInputs: () =>
diff --git a/rsconcept/frontend/src/features/users/backend/types.ts b/rsconcept/frontend/src/features/users/backend/types.ts
index db2132ce..59cad73f 100644
--- a/rsconcept/frontend/src/features/users/backend/types.ts
+++ b/rsconcept/frontend/src/features/users/backend/types.ts
@@ -17,7 +17,7 @@ export type IUpdateProfileDTO = z.infer<typeof schemaUpdateProfile>;
 
 // ========= SCHEMAS ========
 export const schemaUser = z.strictObject({
-  id: z.coerce.number(),
+  id: z.number(),
   username: z.string().nonempty(errorMsg.requiredField),
   is_staff: z.boolean(),
   email: z.email(errorMsg.emailField),