diff --git a/rsconcept/backend/apps/rsform/messages.py b/rsconcept/backend/apps/rsform/messages.py
index a4036347..4141155a 100644
--- a/rsconcept/backend/apps/rsform/messages.py
+++ b/rsconcept/backend/apps/rsform/messages.py
@@ -19,6 +19,9 @@ def renameTaken(name: str):
 def pyconceptFailure():
     return 'Invalid data response from pyconcept'
 
+def typificationInvalidStr():
+    return 'Invalid typification string'
+
 def libraryTypeUnexpected():
     return 'Attempting to use invalid adaptor for non-RSForm item'
 
@@ -27,3 +30,6 @@ def exteorFileVersionNotSupported():
 
 def positionNegative():
     return 'Invalid position: should be positive integer'
+
+def constituentaNoStructure():
+    return 'Указанная конституента не обладает теоретико-множественной типизацией'
diff --git a/rsconcept/backend/apps/rsform/models/Constituenta.py b/rsconcept/backend/apps/rsform/models/Constituenta.py
index 37bf348f..d6de7760 100644
--- a/rsconcept/backend/apps/rsform/models/Constituenta.py
+++ b/rsconcept/backend/apps/rsform/models/Constituenta.py
@@ -3,11 +3,12 @@ import re
 
 from django.db.models import (
     CASCADE, ForeignKey, Model, PositiveIntegerField,
-    TextChoices, TextField, CharField, JSONField
+    TextField, CharField, JSONField
 )
 from django.core.validators import MinValueValidator
 from django.urls import reverse
 
+from .api_RSLanguage import CstType
 from ..utils import apply_pattern
 
 
@@ -15,18 +16,6 @@ _REF_ENTITY_PATTERN = re.compile(r'@{([^0-9\-].*?)\|.*?}')
 _GLOBAL_ID_PATTERN = re.compile(r'([XCSADFPT][0-9]+)') # cspell:disable-line
 
 
-class CstType(TextChoices):
-    ''' Type of constituenta '''
-    BASE = 'basic'
-    CONSTANT = 'constant'
-    STRUCTURED = 'structure'
-    AXIOM = 'axiom'
-    TERM = 'term'
-    FUNCTION = 'function'
-    PREDICATE = 'predicate'
-    THEOREM = 'theorem'
-
-
 def _empty_forms():
     return []
 
diff --git a/rsconcept/backend/apps/rsform/models/api_RSForm.py b/rsconcept/backend/apps/rsform/models/api_RSForm.py
index 5e50c352..957e8bf1 100644
--- a/rsconcept/backend/apps/rsform/models/api_RSForm.py
+++ b/rsconcept/backend/apps/rsform/models/api_RSForm.py
@@ -6,6 +6,7 @@ from django.db.models import QuerySet
 from django.core.exceptions import ValidationError
 
 from cctext import Resolver, Entity, extract_entities, split_grams, TermForm
+from .api_RSLanguage import get_type_prefix, generate_structure
 from .LibraryItem import LibraryItem, LibraryItemType
 from .Constituenta import CstType, Constituenta
 from .Version import Version
@@ -14,27 +15,6 @@ from ..graph import Graph
 from .. import messages as msg
 
 
-def _get_type_prefix(cst_type: CstType) -> str:
-    ''' Get alias prefix. '''
-    if cst_type == CstType.BASE:
-        return 'X'
-    if cst_type == CstType.CONSTANT:
-        return 'C'
-    if cst_type == CstType.STRUCTURED:
-        return 'S'
-    if cst_type == CstType.AXIOM:
-        return 'A'
-    if cst_type == CstType.TERM:
-        return 'D'
-    if cst_type == CstType.FUNCTION:
-        return 'F'
-    if cst_type == CstType.PREDICATE:
-        return 'P'
-    if cst_type == CstType.THEOREM:
-        return 'T'
-    return 'X'
-
-
 class RSForm:
     ''' RSForm is math form of conceptual schema. '''
     def __init__(self, item: LibraryItem):
@@ -95,6 +75,17 @@ class RSForm:
             cst.definition_resolved = resolved
             cst.save()
 
+    def get_max_index(self, cst_type: CstType) -> int:
+        ''' Get maximum alias index for specific CstType '''
+        result: int = 1
+        items = Constituenta.objects \
+            .filter(schema=self.item, cst_type=cst_type) \
+            .order_by('-alias') \
+            .values_list('alias', flat=True)
+        for alias in items:
+            result = max(result, int(alias[1:]))
+        return result
+
     @transaction.atomic
     def insert_at(self, position: int, alias: str, insert_type: CstType) -> 'Constituenta':
         ''' Insert new constituenta at given position.
@@ -105,13 +96,7 @@ class RSForm:
             raise ValidationError(msg.renameTaken(alias))
         currentSize = self.constituents().count()
         position =  max(1, min(position, currentSize + 1))
-        update_list = \
-            Constituenta.objects \
-                .only('id', 'order', 'schema') \
-                .filter(schema=self.item, order__gte=position)
-        for cst in update_list:
-            cst.order += 1
-        Constituenta.objects.bulk_update(update_list, ['order'])
+        self._shift_positions(position, 1)
 
         result = Constituenta.objects.create(
             schema=self.item,
@@ -225,7 +210,7 @@ class RSForm:
             bases[cst_type] = 1
         cst_list = self.constituents().order_by('order')
         for cst in cst_list:
-            alias = f'{_get_type_prefix(cst.cst_type)}{bases[cst.cst_type]}'
+            alias = f'{get_type_prefix(cst.cst_type)}{bases[cst.cst_type]}'
             bases[cst.cst_type] += 1
             if cst.alias != alias:
                 mapping[cst.alias] = alias
@@ -267,6 +252,50 @@ class RSForm:
             data=data
         )
 
+    @transaction.atomic
+    def produce_structure(self, target: Constituenta, parse: dict) -> list[int]:
+        ''' Add constituents for each structural element of the target. '''
+        expressions = generate_structure(
+            alias=target.alias,
+            expression=target.definition_formal,
+            parse=parse
+        )
+        count_new = len(expressions)
+        if count_new == 0:
+            return []
+        position = target.order + 1
+        self._shift_positions(position, count_new)
+
+        result = []
+        cst_type = CstType.TERM if len(parse['args']) == 0 else CstType.FUNCTION
+        free_index = self.get_max_index(cst_type) + 1
+        prefix = get_type_prefix(cst_type)
+        for text in expressions:
+            new_item = Constituenta.objects.create(
+                schema=self.item,
+                order=position,
+                alias=f'{prefix}{free_index}',
+                definition_formal=text,
+                cst_type=cst_type
+            )
+            result.append(new_item.id)
+            free_index = free_index + 1
+            position = position + 1
+
+        self.item.save()
+        return result
+
+    def _shift_positions(self, start: int, shift: int):
+        if shift == 0:
+            return
+        update_list = \
+            Constituenta.objects \
+                .only('id', 'order', 'schema') \
+                .filter(schema=self.item, order__gte=start)
+        for cst in update_list:
+            cst.order += shift
+        Constituenta.objects.bulk_update(update_list, ['order'])
+
     @transaction.atomic
     def _reset_order(self):
         order = 1
diff --git a/rsconcept/backend/apps/rsform/models/api_RSLanguage.py b/rsconcept/backend/apps/rsform/models/api_RSLanguage.py
new file mode 100644
index 00000000..44060cf8
--- /dev/null
+++ b/rsconcept/backend/apps/rsform/models/api_RSLanguage.py
@@ -0,0 +1,120 @@
+''' Models: Definitions and utility function for RSLanguage. '''
+import json
+from typing import Tuple
+from enum import IntEnum , unique
+
+from django.db.models import TextChoices
+
+import pyconcept
+
+from .. import messages as msg
+
+
+@unique
+class TokenType(IntEnum):
+    ''' Some of grammar token types. Full list seek in frontend / pyconcept '''
+    ID_GLOBAL = 259
+    ID_RADICAL = 262
+    DECART = 287
+    BOOLEAN = 292
+    BIGPR = 293
+    SMALLPR = 294
+    REDUCE = 299
+
+
+class CstType(TextChoices):
+    ''' Type of constituenta '''
+    BASE = 'basic'
+    CONSTANT = 'constant'
+    STRUCTURED = 'structure'
+    AXIOM = 'axiom'
+    TERM = 'term'
+    FUNCTION = 'function'
+    PREDICATE = 'predicate'
+    THEOREM = 'theorem'
+
+
+def get_type_prefix(cst_type: CstType) -> str:
+    ''' Get alias prefix. '''
+    if cst_type == CstType.BASE:
+        return 'X'
+    if cst_type == CstType.CONSTANT:
+        return 'C'
+    if cst_type == CstType.STRUCTURED:
+        return 'S'
+    if cst_type == CstType.AXIOM:
+        return 'A'
+    if cst_type == CstType.TERM:
+        return 'D'
+    if cst_type == CstType.FUNCTION:
+        return 'F'
+    if cst_type == CstType.PREDICATE:
+        return 'P'
+    if cst_type == CstType.THEOREM:
+        return 'T'
+    return 'X'
+
+def _get_structure_prefix(alias: str, expression: str, parse: dict) -> Tuple[str, str]:
+    ''' Generate prefix and alias for structure generation. '''
+    args = parse['args']
+    if len(args) == 0:
+        return (alias, '')
+    prefix = expression[0:expression.find(']')] + '] '
+    newAlias = alias + '[' + ','.join([arg['alias'] for arg in args]) + ']'
+    return (newAlias, prefix)
+
+def generate_structure(alias: str, expression: str, parse: dict) -> list:
+    ''' Generate list of expressions for target structure. '''
+    ast = json.loads(pyconcept.parse_expression(parse['typification']))['ast']
+    if len(ast) == 0:
+        raise ValueError(msg.typificationInvalidStr())
+    if len(ast) == 1:
+        return []
+    (link, prefix) = _get_structure_prefix(alias, expression, parse)
+
+    generated: list = []
+    arity: list = [1] * len(ast)
+    for (n, item) in enumerate(ast):
+        if n == 0:
+            generated.append({
+                'text': link, # generated text
+                'operation': None, # applied operation. None if text should be skipped
+                'is_boolean': False # is the result of operation has an additional boolean
+            })
+            continue
+
+        parent_index = item['parent']
+        parent_type = ast[parent_index]['typeID']
+        parent_text = generated[parent_index]['text']
+        parent_is_boolean = generated[parent_index]['is_boolean']
+        assert(parent_type in [TokenType.BOOLEAN, TokenType.DECART])
+
+        if parent_is_boolean:
+            if parent_type == TokenType.BOOLEAN:
+                generated.append({
+                    'text': f'red({parent_text})',
+                    'operation': TokenType.REDUCE,
+                    'is_boolean': True
+                })
+            if parent_type == TokenType.DECART:
+                generated.append({
+                    'text': f'Pr{arity[parent_index]}({parent_text})',
+                    'operation': TokenType.BIGPR,
+                    'is_boolean': True
+                })
+                arity[parent_index] = arity[parent_index] + 1
+        else:
+            if parent_type == TokenType.BOOLEAN:
+                generated.append({
+                    'text': parent_text,
+                    'operation': None,
+                    'is_boolean': True
+                })
+            if parent_type == TokenType.DECART:
+                generated.append({
+                    'text': f'pr{arity[parent_index]}({parent_text})',
+                    'operation': TokenType.SMALLPR,
+                    'is_boolean': False
+                })
+                arity[parent_index] = arity[parent_index] + 1
+    return [prefix + item['text'] for item in generated if item['operation'] is not None]
diff --git a/rsconcept/backend/apps/rsform/serializers/__init__.py b/rsconcept/backend/apps/rsform/serializers/__init__.py
index 8c190dd1..c2214f1d 100644
--- a/rsconcept/backend/apps/rsform/serializers/__init__.py
+++ b/rsconcept/backend/apps/rsform/serializers/__init__.py
@@ -16,12 +16,22 @@ from .data_access import (
     VersionSerializer,
     VersionCreateSerializer,
     ConstituentaSerializer,
+    CstStructuredSerializer,
     CstMoveSerializer,
     CstSubstituteSerializer,
     CstCreateSerializer,
     CstRenameSerializer,
     CstListSerializer
 )
-from .schema_typing import (NewCstResponse, NewVersionResponse, ResultTextResponse)
+from .schema_typing import (
+    NewCstResponse,
+    NewMultiCstResponse,
+    NewVersionResponse,
+    ResultTextResponse
+)
 from .io_pyconcept import PyConceptAdapter
-from .io_files import (FileSerializer, RSFormUploadSerializer, RSFormTRSSerializer)
+from .io_files import (
+    FileSerializer,
+    RSFormUploadSerializer,
+    RSFormTRSSerializer
+)
diff --git a/rsconcept/backend/apps/rsform/serializers/data_access.py b/rsconcept/backend/apps/rsform/serializers/data_access.py
index f14b2c50..3c05fb6a 100644
--- a/rsconcept/backend/apps/rsform/serializers/data_access.py
+++ b/rsconcept/backend/apps/rsform/serializers/data_access.py
@@ -6,10 +6,24 @@ from .basics import ConstituentaID, CstParseSerializer
 
 from .io_pyconcept import PyConceptAdapter
 
-from ..models import Constituenta, LibraryItem, RSForm, Version
+from ..models import Constituenta, LibraryItem, RSForm, Version, CstType
 from .. import messages as msg
 
 
+def _try_access_constituenta(item_id: str, schema: LibraryItem) -> Constituenta:
+    try:
+        cst = Constituenta.objects.get(pk=item_id)
+    except Constituenta.DoesNotExist as exception:
+        raise serializers.ValidationError({
+            f'{item_id}': msg.constituentaNotExists()
+        }) from exception
+    if cst.schema != schema:
+        raise serializers.ValidationError({
+            f'{item_id}': msg.constituentaNotOwned(schema.title)
+        })
+    return cst
+
+
 class LibraryItemSerializer(serializers.ModelSerializer):
     ''' Serializer: LibraryItem entry. '''
     class Meta:
@@ -105,6 +119,24 @@ class CstCreateSerializer(serializers.ModelSerializer):
             'insert_after', 'term_forms'
 
 
+class CstStructuredSerializer(serializers.ModelSerializer):
+    ''' Serializer: Constituenta structure production. '''
+    class Meta:
+        ''' serializer metadata. '''
+        model = Constituenta
+        fields = ('id',)
+
+    def validate(self, attrs):
+        schema = cast(LibraryItem, self.context['schema'])
+        cst = _try_access_constituenta(self.initial_data['id'], schema)
+        if cst.cst_type not in [CstType.FUNCTION, CstType.STRUCTURED, CstType.TERM]:
+            raise serializers.ValidationError({
+                f'{cst.id}': msg.constituentaNoStructure()
+            })
+        self.instance = cst
+        return attrs
+
+
 class CstRenameSerializer(serializers.ModelSerializer):
     ''' Serializer: Constituenta renaming. '''
     class Meta:
@@ -113,23 +145,19 @@ class CstRenameSerializer(serializers.ModelSerializer):
         fields = 'id', 'alias', 'cst_type'
 
     def validate(self, attrs):
-        schema = cast(RSForm, self.context['schema'])
-        old_cst = Constituenta.objects.get(pk=self.initial_data['id'])
+        schema = cast(LibraryItem, self.context['schema'])
+        cst = _try_access_constituenta(self.initial_data['id'], schema)
         new_alias = self.initial_data['alias']
-        if old_cst.schema != schema.item:
-            raise serializers.ValidationError({
-                'id': msg.constituentaNotOwned(schema.item.title)
-            })
-        if old_cst.alias == new_alias:
+        if cst.alias == new_alias:
             raise serializers.ValidationError({
                 'alias': msg.renameTrivial(new_alias)
             })
-        if schema.constituents().filter(alias=new_alias).exists():
+        if RSForm(schema).constituents().filter(alias=new_alias).exists():
             raise serializers.ValidationError({
                 'alias': msg.renameTaken(new_alias)
             })
-        self.instance = old_cst
-        attrs['schema'] = schema.item
+        self.instance = cst
+        attrs['schema'] = schema
         attrs['id'] = self.initial_data['id']
         return attrs
 
@@ -227,20 +255,20 @@ class CstSubstituteSerializer(serializers.Serializer):
     transfer_term = serializers.BooleanField(required=False, default=False)
 
     def validate(self, attrs):
-        schema = cast(RSForm, self.context['schema'])
+        schema = cast(LibraryItem, self.context['schema'])
         original_cst = Constituenta.objects.get(pk=self.initial_data['original'])
         substitution_cst = Constituenta.objects.get(pk=self.initial_data['substitution'])
         if original_cst.alias == substitution_cst.alias:
             raise serializers.ValidationError({
                 'alias': msg.substituteTrivial(original_cst.alias)
             })
-        if original_cst.schema != schema.item:
+        if original_cst.schema != schema:
             raise serializers.ValidationError({
-                'original': msg.constituentaNotOwned(schema.item.title)
+                'original': msg.constituentaNotOwned(schema.title)
             })
-        if substitution_cst.schema != schema.item:
+        if substitution_cst.schema != schema:
             raise serializers.ValidationError({
-                'substitution': msg.constituentaNotOwned(schema.item.title)
+                'substitution': msg.constituentaNotOwned(schema.title)
             })
         attrs['original'] = original_cst
         attrs['substitution'] = substitution_cst
@@ -255,19 +283,10 @@ class CstListSerializer(serializers.Serializer):
     )
 
     def validate(self, attrs):
-        schema = self.context['schema']
+        schema = cast(LibraryItem, self.context['schema'])
         cstList = []
         for item in attrs['items']:
-            try:
-                cst = Constituenta.objects.get(pk=item)
-            except Constituenta.DoesNotExist as exception:
-                raise serializers.ValidationError({
-                    f'{item}': msg.constituentaNotExists
-                }) from exception
-            if cst.schema != schema.item:
-                raise serializers.ValidationError({
-                    f'{item}': msg.constituentaNotOwned(schema.item.title)
-                })
+            cst = _try_access_constituenta(item, schema)
             cstList.append(cst)
         attrs['constituents'] = cstList
         return attrs
diff --git a/rsconcept/backend/apps/rsform/serializers/schema_typing.py b/rsconcept/backend/apps/rsform/serializers/schema_typing.py
index bb23e5a5..c470106e 100644
--- a/rsconcept/backend/apps/rsform/serializers/schema_typing.py
+++ b/rsconcept/backend/apps/rsform/serializers/schema_typing.py
@@ -1,7 +1,7 @@
 ''' Utility serializers for REST API schema - SHOULD NOT BE ACCESSED DIRECTLY. '''
 from rest_framework import serializers
 
-from .data_access import ConstituentaSerializer, RSFormParseSerializer
+from .data_access import RSFormParseSerializer
 
 class ResultTextResponse(serializers.Serializer):
     ''' Serializer: Text result of a function call. '''
@@ -10,7 +10,14 @@ class ResultTextResponse(serializers.Serializer):
 
 class NewCstResponse(serializers.Serializer):
     ''' Serializer: Create cst response. '''
-    new_cst = ConstituentaSerializer()
+    new_cst = serializers.IntegerField()
+    schema = RSFormParseSerializer()
+
+class NewMultiCstResponse(serializers.Serializer):
+    ''' Serializer: Create multiple cst response. '''
+    cst_list = serializers.ListField(
+        child=serializers.IntegerField()
+    )
     schema = RSFormParseSerializer()
 
 class NewVersionResponse(serializers.Serializer):
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 aa8f96d5..fd5c8806 100644
--- a/rsconcept/backend/apps/rsform/tests/s_views/t_rsforms.py
+++ b/rsconcept/backend/apps/rsform/tests/s_views/t_rsforms.py
@@ -384,7 +384,7 @@ class TestRSFormViewset(APITestCase):
         )
         x2.refresh_from_db()
         schema.item.refresh_from_db()
-        self.assertEqual(response.status_code, status.HTTP_202_ACCEPTED)
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
         self.assertEqual(len(response.data['items']), 1)
         self.assertEqual(schema.constituents().count(), 1)
         self.assertEqual(x2.alias, 'X2')
@@ -498,3 +498,88 @@ class TestRSFormViewset(APITestCase):
         self.assertEqual(response.data['items'][0]['term_resolved'], x1.term_resolved)
         self.assertEqual(response.data['items'][1]['term_raw'], d1.term_raw)
         self.assertEqual(response.data['items'][1]['term_resolved'], d1.term_resolved)
+
+    def test_produce_structure(self):
+        item = self.owned.item
+        x1 = Constituenta.objects.create(schema=item, alias='X1', cst_type='basic', order=1)
+        s1 = Constituenta.objects.create(schema=item, alias='S1', cst_type='structure', order=2)
+        s2 = Constituenta.objects.create(schema=item, alias='S2', cst_type='structure', order=3)
+        s3 = Constituenta.objects.create(schema=item, alias='S3', cst_type='structure', order=4)
+        a1 = Constituenta.objects.create(schema=item, alias='A1', cst_type='axiom', order=5)
+        f1 = Constituenta.objects.create(schema=item, alias='F10', cst_type='function', order=6)
+        invalid_id = f1.id + 1
+        s1.definition_formal = 'ℬ(X1×X1)' # ℬ(X1×X1)
+        s2.definition_formal = 'invalid'
+        s3.definition_formal = 'X1×(X1×ℬℬ(X1))×ℬ(X1×X1)'
+        a1.definition_formal = '1=1'
+        f1.definition_formal = '[α∈X1, β∈X1] Fi1[{α,β}](S1)'
+        s1.save()
+        s2.save()
+        s3.save()
+        a1.save()
+        f1.save()
+
+        data = {'id': invalid_id}
+        response = self.client.patch(
+            f'/api/rsforms/{item.id}/cst-produce-structure',
+            data=data, format='json'
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+        data = {'id': x1.id}
+        response = self.client.patch(
+            f'/api/rsforms/{item.id}/cst-produce-structure',
+            data=data, format='json'
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+        data = {'id': s2.id}
+        response = self.client.patch(
+            f'/api/rsforms/{item.id}/cst-produce-structure',
+            data=data, format='json'
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+        # Testing simple structure
+        s1.refresh_from_db()
+        data = {'id': s1.id}
+        response = self.client.patch(
+            f'/api/rsforms/{item.id}/cst-produce-structure',
+            data=data, format='json'
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        result = response.data['schema']
+        items = [item for item in result['items'] if item['id'] in response.data['cst_list']]
+        self.assertEqual(len(items), 2)
+        self.assertEqual(items[0]['order'], s1.order + 1)
+        self.assertEqual(items[0]['definition_formal'], 'Pr1(S1)')
+        self.assertEqual(items[1]['order'], s1.order + 2)
+        self.assertEqual(items[1]['definition_formal'], 'Pr2(S1)')
+
+        # Testing complex structure
+        s3.refresh_from_db()
+        data = {'id': s3.id}
+        response = self.client.patch(
+            f'/api/rsforms/{item.id}/cst-produce-structure',
+            data=data, format='json'
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        result = response.data['schema']
+        items = [item for item in result['items'] if item['id'] in response.data['cst_list']]
+        self.assertEqual(len(items), 8)
+        self.assertEqual(items[0]['order'], s3.order + 1)
+        self.assertEqual(items[0]['definition_formal'], 'pr1(S3)')
+
+        # Testing function
+        f1.refresh_from_db()
+        data = {'id': f1.id}
+        response = self.client.patch(
+            f'/api/rsforms/{item.id}/cst-produce-structure',
+            data=data, format='json'
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        result = response.data['schema']
+        items = [item for item in result['items'] if item['id'] in response.data['cst_list']]
+        self.assertEqual(len(items), 2)
+        self.assertEqual(items[0]['order'], f1.order + 1)
+        self.assertEqual(items[0]['definition_formal'], '[α∈X1, β∈X1] Pr1(F10[α,β])')
diff --git a/rsconcept/backend/apps/rsform/views/rsforms.py b/rsconcept/backend/apps/rsform/views/rsforms.py
index 0f6aeaf5..af6fd1d6 100644
--- a/rsconcept/backend/apps/rsform/views/rsforms.py
+++ b/rsconcept/backend/apps/rsform/views/rsforms.py
@@ -11,9 +11,11 @@ from drf_spectacular.utils import extend_schema, extend_schema_view
 from rest_framework import status as c
 
 import pyconcept
+
 from .. import models as m
 from .. import serializers as s
 from .. import utils
+from .. import messages as msg
 
 
 @extend_schema(tags=['RSForm'])
@@ -63,6 +65,38 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
         response['Location'] = new_cst.get_absolute_url()
         return response
 
+    @extend_schema(
+        summary='produce the structure of a given constituenta',
+        tags=['RSForm'],
+        request=s.CstStructuredSerializer,
+        responses={c.HTTP_200_OK: s.NewMultiCstResponse}
+    )
+    @action(detail=True, methods=['patch'], url_path='cst-produce-structure')
+    def produce_structure(self, request: Request, pk):
+        ''' Produce a term for every element of the target constituenta typification. '''
+        schema = self._get_schema()
+
+        serializer = s.CstStructuredSerializer(data=request.data, context={'schema': schema.item})
+        serializer.is_valid(raise_exception=True)
+        cst = cast(m.Constituenta, serializer.instance)
+
+        schema_details = s.RSFormParseSerializer(schema.item).data['items']
+        cst_parse = next(item for item in schema_details if item['id']==cst.id)['parse']
+        if not cst_parse['typification']:
+            return Response(
+            status=c.HTTP_400_BAD_REQUEST,
+            data={f'{cst.id}': msg.constituentaNoStructure()}
+        )
+
+        result = schema.produce_structure(cst, cst_parse)
+        return Response(
+            status=c.HTTP_200_OK,
+            data={
+                'cst_list': result,
+                'schema': s.RSFormParseSerializer(schema.item).data
+            }
+        )
+
     @extend_schema(
         summary='rename constituenta',
         tags=['Constituenta'],
@@ -74,7 +108,7 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
     def cst_rename(self, request: Request, pk):
         ''' Rename constituenta possibly changing type. '''
         schema = self._get_schema()
-        serializer = s.CstRenameSerializer(data=request.data, context={'schema': schema})
+        serializer = s.CstRenameSerializer(data=request.data, context={'schema': schema.item})
         serializer.is_valid(raise_exception=True)
         old_alias = m.Constituenta.objects.get(pk=request.data['id']).alias
         serializer.save()
@@ -92,7 +126,7 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
 
     @extend_schema(
         summary='substitute constituenta',
-        tags=['Constituenta'],
+        tags=['RSForm'],
         request=s.CstSubstituteSerializer,
         responses={c.HTTP_200_OK: s.RSFormParseSerializer}
     )
@@ -101,7 +135,10 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
     def cst_substitute(self, request: Request, pk):
         ''' Substitute occurrences of constituenta with another one. '''
         schema = self._get_schema()
-        serializer = s.CstSubstituteSerializer(data=request.data, context={'schema': schema})
+        serializer = s.CstSubstituteSerializer(
+            data=request.data,
+            context={'schema': schema.item}
+        )
         serializer.is_valid(raise_exception=True)
         schema.substitute(
             original=serializer.validated_data['original'],
@@ -116,9 +153,9 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
 
     @extend_schema(
         summary='delete constituents',
-        tags=['Constituenta'],
+        tags=['RSForm'],
         request=s.CstListSerializer,
-        responses={c.HTTP_202_ACCEPTED: s.RSFormParseSerializer}
+        responses={c.HTTP_200_OK: s.RSFormParseSerializer}
     )
     @action(detail=True, methods=['patch'], url_path='cst-delete-multiple')
     def cst_delete_multiple(self, request: Request, pk):
@@ -126,19 +163,19 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
         schema = self._get_schema()
         serializer = s.CstListSerializer(
             data=request.data,
-            context={'schema': schema}
+            context={'schema': schema.item}
         )
         serializer.is_valid(raise_exception=True)
         schema.delete_cst(serializer.validated_data['constituents'])
         schema.item.refresh_from_db()
         return Response(
-            status=c.HTTP_202_ACCEPTED,
+            status=c.HTTP_200_OK,
             data=s.RSFormParseSerializer(schema.item).data
         )
 
     @extend_schema(
         summary='move constituenta',
-        tags=['Constituenta'],
+        tags=['RSForm'],
         request=s.CstMoveSerializer,
         responses={c.HTTP_200_OK: s.RSFormParseSerializer}
     )
@@ -148,7 +185,7 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
         schema = self._get_schema()
         serializer = s.CstMoveSerializer(
             data=request.data,
-            context={'schema': schema}
+            context={'schema': schema.item}
         )
         serializer.is_valid(raise_exception=True)
         schema.move_cst(