# Identifiers

The `identifiers` fetch action retrieves a list of items that are present in the repository and returns an identifier for each item. This action can be used by front end applications for providing an interface to browse a repository. You can use the identifiers that are returned by this action in other connector actions that require you to provide identifiers.

By default the `identifiers` action only returns identifiers for items that would be synchronized using the specified task configuration. If you have set configuration parameters to exclude certain items, those items are not returned. If you want to see excluded items, set the action parameter `ShowExcluded` to `TRUE`.

TIP: The `identifiers` fetch action does not expand container files, and does not provide identifiers for sub-files.

Type: Asynchronous

Parameter Name | Description | Required
--- | --- | ---
`Config` | A base-64 encoded configuration. The configuration parameters that are set override the same parameters in the connector's configuration file. | No
`ConfigSection` | The name of the configuration file section that contains the task settings. | Yes
`ContainersOnly` | A Boolean value (default false) that specifies whether to return only those items that represent containers. | No
`FilterTypes` | A comma-separated list of the types of items to return identifiers for. If you omit this parameter, the action returns items of all types. | No
`Identifiers` | A comma-separated list of identifiers. The action returns identifiers (and status information if supported) for these items and their ancestors, but does not return descendant items (to do this, set the `ParentIdentifiers` parameter instead). | Set this parameter or `ParentIdentifiers`
`IdentifiersAction` | The name of an action to perform on the returned identifiers. Only the `collect` fetch action is available. If the action you specify would require additional parameters, specify them as parameters to this action. | No
`MaxDepth` | The maximum depth that the connector crawls in the repository (from `ParentIdentifiers`). The default maximum depth is 1. To specify no limit, set this parameter to `0` (zero). Be aware that if you increase the maximum depth or specify an unlimited maximum depth, the action could take a long time to complete. | No
`ParentIdentifiers` | A comma-separated list of identifiers. The action returns identifiers (and status information if supported) for these items, and for ancestors and descendants of these items. To specify the root of the repository, set this parameter to `ROOT`. | Set this parameter or `Identifiers`
`ShowAncestors` | A Boolean value (default true) that specifies whether to return the identifiers of ancestors for items specified by `ParentIdentifiers` or `Identifiers`. The action returns parent items up to the root of the repository. | No
`ShowAttributes` | A Boolean value (default true) that specifies whether to show attributes in the response. For example, shows whether an item is a container, and shows whether a document could be ingested to represent the item. | No
`ShowDocStatus` | A Boolean value (default false) that specifies whether to show status information. This can include the ingestion status for each document and the modification history for items in the repository. | No
`ShowExcluded` | A Boolean value (default false) that specifies whether to return identifiers for excluded items. (Items that would not be synchronized because they are excluded by the task configuration). By default the action only returns items that would be synchronized. If you want to see items that would be ignored, set this parameter to true. | No
`ShowMetadata` | A comma-separated list of basic metadata fields to return for each item. You can set this parameter to a comma-separated list of the following values: `createdDate` - the date when the item was created. `modifiedDate` - the date when them was last modified. `sizeBytes` - the size of the item in bytes. If you omit this parameter the connector does not return metadata. This feature is not supported by all connectors, and some platforms, repositories, or items might not support all of the metadata fields. | No
`ShowNames` | A Boolean value (default true) that specifies whether the response shows a display name for each item (if one is available). | No
`ShowTypes` | A Boolean value (default true) that specifies whether the response shows the type of item that each identifier represents. | No
`Override_Config_Parameters` | Any other action parameters that you set override settings in the connector's configuration file. For example:
    /action=fetch&fetchaction=...
                 &[Section]Parameter=Value
where `[Section]` (optional) is the name of a configuration file section, `Parameter` is the name of a configuration parameter, and `Value` is the parameter value. | No

## Example

The following example sends the `identifiers` fetch action to the connector. The connector returns the items that it finds by crawling from the root of the repository to a maximum depth of two levels:

    http://localhost:7154/action=Fetch&FetchAction=Identifiers
                                      &ConfigSection=MyTask
                                      &ParentIdentifiers=ROOT
                                      &MaxDepth=2

## Response

The `fetch` action is asynchronous, so it returns a token. You can use the token with the `QueueInfo` action to retrieve the response.

The response contains an `<identifiers parent_identifier="...">` element for each of the identifiers passed to the action in the `ParentIdentifiers` or `Identifiers` action parameter. If you use the `ParentIdentifiers` action parameter and set the `MaxDepth` action parameter to a value greater than `1`, the response also contains an `<identifiers parent_identifier="...">` element for descendant items that have child identifiers, down to the requested depth. The `parent_identifier` attribute specifies the identifier of the item. These elements can also include the following attributes:

- `self="true"` indicates that this is one of the identifiers you passed to the action in the `ParentIdentifiers` or `Identifiers` parameter.
- `ancestor="true"` indicates that this item is an ancestor of one of the identifiers you passed to the action in the `ParentIdentifiers` or `Identifiers` parameter. You can hide these elements by setting the action parameter `ShowAncestors=False`.
- `descendant="true"` indicates that this item is a descendant of one of the identifiers you passed to the action in the `ParentIdentifiers` parameter. You can limit the number of descendants that are returned by setting the action parameter `MaxDepth`.

Each `<identifiers parent_identifier="...">` element contains `<identifier ...>` elements for items that are direct descendants of the parent item.

An `<identifiers ...>` or `<identifier ...>` element can provide the following attributes:

- `name` - a display name for the item (if one is available).

- `attributes` - contains a comma-separated list of attributes for the item.

  - If an item has the `container` attribute it is an item that can contain other items. To retrieve the identifiers of the child items, increase the value of `MaxDepth` or run the action again, using the identifier of the container as the value of the `ParentIdentifiers` action parameter.
  - If an item has the `document` attribute it is a file or has metadata that can be ingested.

- `meta_*` - these attributes contain basic metadata for the item. They are present in the response only if you set the `ShowMetadata` action parameter. This feature is not supported by all connectors, and some platforms, repositories, or items might not support all of the metadata fields.

  - `meta_createdDate` - the date when the item was created, in epoch seconds.
  - `meta_modifiedDate` - the date when the item was last modified, in epoch seconds.
  - `meta_sizeBytes` - the size of the item, in bytes.

- `type` - the type of item that the identifier represents.

- `exclude` - indicates whether the item is excluded from being synchronized by the task configuration. This attribute can have any combination of the values `self` (the item itself is excluded) and `children` (all descendants of the item are excluded, to an unlimited depth). For example, `exclude="self,children"` means that the item and its descendants are both excluded. Excluded items and the `exclude` attribute are returned in the response only when you set the action parameter `ShowExcluded=TRUE`. Be aware that an identifier might not be marked as excluded but could be excluded because one of its ancestors has the exclude attribute `exclude="children"`.

The `identifiers` action for the Jama Connector can return the following types:

Type | Possible Attributes | Description | Display Name | Child Identifier Types
--- | --- | --- | --- | ---
`Project` | `container`, `document` | A Jama project. | The Jama project key, for example "AID". | Item
`Item` | `container` (when ProcessComments is `TRUE`), `document` | An item within a Jama project, such as an item, attachment, or test run. | The Jama document key with type and ID, for example "AID-ATT-1 (attachments/1)". | Comment
`Comment` | `container`, `document` | A comment, or a reply to a comment, on an item within a Jama project. | comments/comment id. For example "comments/1". | Comment

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