Initial commit: Financial Crime domain exemplar

financial_crime/entities/teller.md

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+# [Financial Crime](../domain.md)
+
+## Entities
+
+### Teller
+
+A Teller is a Party Role representing a bank employee who processes branch-based customer transactions.
+
+```mermaid
+---
+config:
+  layout: elk
+---
+classDiagram
+  class Teller{
+    * Teller Identifier : string
+    Employee Number : string
+    Assigned Branch Identifier : string
+  }
+
+  Teller --|> PartyRole
+  Teller "1" --> "0..*" Transaction : processes
+  Teller "0..*" --> "1" Branch : assigned to
+
+  class PartyRole["<a href='https://github.com/Semprini/md-ddl/blob/main/examples/Financial%20Crime/entities/party_role.md'>Party Role</a>"]
+  class Transaction["<a href='https://github.com/Semprini/md-ddl/blob/main/examples/Financial%20Crime/entities/transaction.md'>Transaction</a>"]
+  class Branch["<a href='https://github.com/Semprini/md-ddl/blob/main/examples/Financial%20Crime/entities/branch.md'>Branch</a>"]
+```
+
+```yaml
+extends: Party Role
+existence: independent
+mutability: slowly_changing
+attributes:
+  Teller Identifier:
+    type: string
+    identifier: primary
+    description: Unique identifier for the teller role instance.
+
+  Employee Number:
+    type: string
+    description: Internal identifier of the staff member acting as teller.
+
+  Assigned Branch Identifier:
+    type: string
+    description: Branch identifier where the teller is primarily assigned.
+```
+
+```yaml
+governance:
+  retention_basis: Inherited from domain default retention of 10 years post relationship end for AML/CTF record-keeping
+```
+
+## Relationships
+
+### Teller Processes Transaction
+
+A Teller can process one or more branch-mediated Transactions.
+
+```yaml
+source: Teller
+type: associates_with
+target: Transaction
+cardinality: one-to-many
+granularity: atomic
+ownership: Teller
+```
+
+### Teller Assigned To Branch
+
+A Teller is assigned to a Branch for operational responsibilities.
+
+```yaml
+source: Teller
+type: assigned_to
+target: Branch
+cardinality: many-to-one
+granularity: atomic
+ownership: Teller
+```