Initial import NDC_1C

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+# ontology_v0_1
+
+## Scope
+
+Базовая каноническая онтология бухгалтерского контура для MVP и assistant layer.
+
+## Core Facts
+
+### Posting (primary fact)
+
+`Posting` — основной факт бухгалтерского отражения.
+
+Required fields:
+- `posting_id`
+- `period`
+- `document_id`
+- `organization_id`
+- `debit_account_id`
+- `credit_account_id`
+- `amount`
+- `source_register`
+
+Optional fields:
+- `currency_id`
+- `subconto_1`
+- `subconto_2`
+- `subconto_3`
+- `content`
+- `is_active`
+
+### RegisterMovement (secondary fact)
+
+`RegisterMovement` — вспомогательный факт трассировки, не второй источник истины для учета.
+
+Required fields:
+- `movement_id`
+- `register_name`
+- `period`
+- `recorder_document_id`
+
+Optional fields:
+- `organization_id`
+- `dimensions`
+- `resources`
+- `is_active`
+
+### Document
+
+Required fields:
+- `document_id`
+- `document_type`
+- `number`
+- `date`
+
+Optional fields:
+- `organization_id`
+- `counterparty_id`
+- `contract_id`
+- `posted_flag`
+- `author_id`
+- `comment`
+- `source_entity_set`
+
+## Main Dimensions
+
+- `Account`
+- `SubcontoType`
+- `Counterparty`
+- `Contract`
+- `Organization`
+- `BankAccount`
+- `Currency`
+- `Item`
+
+## Canonical Relations
+
+- `Document -> creates -> Posting`
+- `Posting -> basedOn -> Document`
+- `Posting -> debitAccount -> Account`
+- `Posting -> creditAccount -> Account`
+- `Posting -> belongsTo -> Organization`
+- `Posting -> hasCurrency -> Currency`
+- `Posting -> usesSubcontoType -> SubcontoType`
+- `Counterparty -> hasContract -> Contract`
+- `Organization -> ownsBankAccount -> BankAccount`
+- `Document -> referencesCounterparty -> Counterparty`
+- `Document -> referencesContract -> Contract`
+- `Document -> referencesOrganization -> Organization`
+- `Document -> referencesBankAccount -> BankAccount`
+
+## Modeling Rules
+
+1. `Posting` и `RegisterMovement` не дублируют один и тот же факт без явного правила приоритета.
+2. Каждая связь имеет `probe_status`: `direct|derivable|opaque|missing`.
+3. Источник связи фиксируется через `source_evidence` (metadata, navigation link, key-based join, inference).