# Concept Dictionary Data Dictionary

The [Conceptual Concept Dictionary](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md) expressed in the physical data model in ADO.NET providers is illustrated below.

![](/files/-MlR4-77tT4utaqaNwKg)

| Physical Table          | Conceptual Entity                                                                                                                                             | Description                                                                                     |
| ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------- |
| `cd_tbl`                | [Concept](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#concept)                                     | Non-versioned properties of the concept table.                                                  |
| `cd_vrsn_tbl`           | [Concept Version](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#concept-version)                     | Versioned properties of the concept table.                                                      |
| `cd_name_tbl`           | [Concept Name](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#concept-name)                           | Human readable names of the concept in various languages.                                       |
| `cd_rel_assoc_tbl`      | [Concept Relationship](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#concept-relationship)           | Concept relationships table.                                                                    |
| `cd_rel_typ_cdtbl`      | [Concept Relationship Type](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#concept-relationship-type) | Concept Relationship types reference code table.                                                |
| `cd_set_tbl`            | [Concept Set](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#concept-set)                             | Concept Set definition table.                                                                   |
| `cd_set_mem_assoc_tbl`  | Concept Set Member                                                                                                                                            | Concept Set <> Concept relationship associative table.                                          |
| `cd_ref_term_assoc_tbl` | [Concept Reference Term](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#concept-reference-term)       | Concept <> Reference Term associated table.                                                     |
| `ref_term_tbl`          | [Reference Term](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#reference-term)                       | Reference term definition table.                                                                |
| `ref_term_name_tbl`     | [Reference Term Name](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#reference-term-display-name)     | Preferred display names of the reference term (when being represented on a standards interface) |
| `cd_sys_tbl`            | [Code System](/santedb/data-and-information-architecture/conceptual-data-model/concept-dictionary/data-dictionary.md#code-system)                             | Code system table                                                                               |


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