# ContactAssignment

object type

A contact assignment — ONE role-tagged attachment of a Contact to a HOST construct (org group / organization / logical facility / vendor / corporate customer). Parent = the HOST (the CollectionMember stance — hostId rides the header parentId). The (contact, host, role) triple is unique (a live duplicate is CONFLICT/IDENTITY_TAKEN naming the holder); REMOVE = doom (TWO_STATE — history preserved); re-assigning mints a NEW record via marker takeover. Role↔host applicability is registry DATA. At most 48 live assignments per host.

## Fields

| Field | Type | Notes |
| --- | --- | --- |
| `id` | [ID](/types/#scalars) `ID!` | The record’s id — a UUID the platform assigned when the record was created; every reference to this record uses it. |
| `sysId` | [String](/types/#scalars) `String!` | The group-scoped human-facing system id (CA-…). |
| `type` | [String](/types/#scalars) `String!` | The kind of record — always `ContactAssignment` here. |
| `caption` | [String](/types/#scalars) `String!` | The record’s display name — what people see it called. |
| `status` | [String](/types/#scalars) `String!` | The FSM state: active \| doomed. |
| `parentId` | [ID](/types/#scalars) `ID!` | The parent HOST construct; parentId === rootId only when the host IS the group. |
| `rootId` | [ID](/types/#scalars) `ID!` | The org-group family root. |
| `createdAt` | [String](/types/#scalars) `String!` | When the record was created, as a UTC timestamp. |
| `updatedAt` | [String](/types/#scalars) `String!` | When the record last changed, as a UTC timestamp. |
| `revisionNum` | [Int](/types/#scalars) `Int!` | How many times this record has been edited; the first save is 0. |
| `revision` | [ID](/types/#scalars) `ID!` | The OCC revision token — supply it on every mutation of this record; rotates on every write. |
| `refCaptions` | [RefCaption](/types/RefCaption/) `[RefCaption!]!` | The server-composed captions of this record's declared references (the referenced-caption rule) — one row per referenced id; see RefCaption. |
| `contactId` | [ID](/types/#scalars) `ID!` | The assigned Contact — set at creation, IMMUTABLE thereafter (a different link is a NEW assignment). |
| `hostType` | [ContactAssignmentHostType](/types/ContactAssignmentHostType/) `ContactAssignmentHostType!` | The host's construct class — the parent-slot discriminator; IMMUTABLE at birth. |
| `role` | [String](/types/#scalars) `String!` | The role this contact plays at the host — the canned + AT-extensible ContactRole registry (primary · owner · manager · billing-AP · accounts-receivable · purchasing-buyer · sales-rep · shipping-logistics · returns · support · technical · emergency); IMMUTABLE at birth. |

## Used by

- [contactAssignment](/reference/contact-assignment/contactAssignment/)
- [contactAssignments](/reference/contact-assignment/contactAssignments/)
- [createContactAssignment](/reference/contact-assignment/createContactAssignment/)
- [doomContactAssignment](/reference/contact-assignment/doomContactAssignment/)
- [updateContactAssignment](/reference/contact-assignment/updateContactAssignment/)