Data dictionary: Segment membership – Ometria Help Centre

You can create a regular, scheduled data export from Ometria to an AWS S3 bucket, Databricks, Google Cloud, Microsoft Azure, or an SFTP you host.

See also: Customised data export

Segment membership records track which contacts are members of a given dynamic segment, and when they enter or exit it.

The first time the export runs, you can request a snapshot of every contact currently in the segment. From the second run onwards, you receive only the changes since the last export: the contacts who have entered the segment and the contacts who have exited it.

See also: Create a dynamic segment

Note: Segment membership exports are only available for dynamic segments. Static segments are not supported.

Note: Empty fields are passed as null - this means Ometria has no data for that field.

If you'd like to set up a data export please get in touch with your Customer Success Representative.

The following fields are passed for your segment membership records:

Field	Type	Description
list_id	String	The ID of the segment this record relates to. `"list_id": "abcdef123456"`
their_id	String	The contact's Customer ID. `"their_id": "2319605"`
email	String	The contact's email address. `"email": "johnsmith@ometria.com"`
profile_hash	String	A unique, encoded identifier for the contact's profile, sometimes called a profile ID. `"profile_hash": "8cdcf152e871646a"`
event_type	String	The membership change type. Only present in subsequent (delta) exports. One of `list_enter` or `list_exit`. `"event_type": "list_enter"`
dt_event	Time	The date and time the contact entered or exited the segment. Only present in subsequent (delta) exports. `"dt_event": "2026-05-17T09:14:22+00:00"`

For the full set of contact fields you can contact record export, see Data dictionary: Contact records.

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