The RESO OUID's OrganizationUniqueId of the Source record provider. The source system is the system from which the record was directly received. In cases where the source system was not where the record originated (the authoritative system), see the Originating System fields.

Standard Name: SourceSystemID

Display Name: Source System ID

Group: --

Data Type: String

Suggested Maximum Length: 25

Suggested Maximum Precision: --

Synonyms(s): MLSID

Field (Element) Status: ACTIVE


Record ID: dd425d6

Lookup Status: --

Lookup: --

Payloads: IDX

Spanish Name: ID Sistema Fuente

French-Canadian Name: --

Status Change Date: DEC 26 2018

Revision Date: DEC 05 2018

Added in Version: 1.5.0


  • 24% of Systems (4/17)
  • 15% of Organizations (74/501)

For more information on items displayed on this page, see Data Dictionary Terms and Meta Definitions.

RESO certifies against the Standard Name.

Display Name represents a recommendation for public display that MLSs and other data producers may use based on local, legal and language-based needs.

Page Revision Date: Nov 08 2023

Form: OtherSimple