# (NEW!) Update Metadata Template

Partially update an existing metadata template. Only fields included in the request body will be updated — omitted fields remain unchanged.

Updatable Fields: name, groupIds, attributesDefaultValue, accessTemplates, templateOverride

Fields that cannot be updated: templateId, customerId, createdBy, createdEpoch, createdDate, templateType, templateDenormalized, dependencies

Key Business Rules:
- Request body must contain at least one updatable field
- Unknown or immutable fields are rejected with 400
- name must be unique per customer (case-insensitive) — duplicate returns 409
- groupIds must reference existing groups; system group is auto-appended last
- Duplicate effective attributes across groups return 400
- accessTemplates must reference existing access templates; can be cleared with []
- attributesDefaultValue keys must exist in the effective template
- templateDenormalized is regenerated on every successful update

The user submitting the request must have the Metadata Management admin privilege.

Endpoint: PATCH /metadata/template/{id}
Version: 1.5
Security: ApiKeyAuth, BasicAuth

## Header parameters:

  - `Authorization` (string, required)
    Bearer token from authentication.

  - `X-API-Key` (string)
    Customer-specific API key (optional).

  - `Content-Type` (string, required)
    Enum: "application/json"

## Path parameters:

  - `id` (string, required)
    The unique ID of the metadata template to update.
    Example: "8cd2c221-6a91-4dc6-9379-d55dca9d5313"

## Request fields (application/json):

  - `name` (string)
    Display name of the metadata template.
    Example: "Updated Product Template"

  - `groupIds` (array)
    Attribute groups included in the template. Replaces existing list.
    Example: ["52ce0235-02cc-46f6-8bdb-05238c76bf83","5d1f1f87-5f64-4e03-8a2b-2c7e77f85bcb"]

  - `attributesDefaultValue` (array)
    Default metadata values for fields in the template.
    Example: [{"searchField":"title","value":"Test Assets"}]

  - `attributesDefaultValue.searchField` (string)

  - `attributesDefaultValue.value` (any)
    The default value.

  - `accessTemplates` (array)
    Access template IDs. Pass [] to clear.
    Example: []

  - `templateOverride` (object)
    Template-level required/optional attribute overrides.

  - `templateOverride.required` (array)
    searchFields to make required at the template level.
    Example: ["title"]

  - `templateOverride.optional` (array)
    searchFields to make optional at the template level.
    Example: ["country"]

## Response 200 fields (application/json):

  - `templateId` (string)

  - `name` (string)

  - `customerId` (string)

  - `createdBy` (string)

  - `createdEpoch` (integer)

  - `createdDate` (string)

  - `lastUpdatedBy` (string)

  - `lastUpdatedEpoch` (integer)

  - `lastUpdatedDate` (string)

  - `groupIds` (array)

  - `templateType` (array)

  - `attributesDefaultValue` (array)

  - `attributesDefaultValue.searchField` (string)

  - `attributesDefaultValue.value` (any)
    Default value for the attribute.

  - `accessTemplates` (array)

  - `templateOverride` (object)

  - `templateOverride.required` (array)

  - `templateOverride.optional` (array)

  - `templateDenormalized` (object)
    System-generated denormalized template structure.

## Response 400 fields (application/json):

  - `message` (string)

  - `detail` (string)

## Response 401 fields (application/json):

  - `message` (string)

  - `detail` (string)

## Response 403 fields (application/json):

  - `message` (string)

  - `detail` (string)

## Response 404 fields (application/json):

  - `message` (string)

  - `detail` (string)

## Response 409 fields (application/json):

  - `message` (string)

  - `detail` (string)