DD 2.1 DRAFT

RESO Data Dictionary 2.1 – 44 resources, 2,168 fields

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Association

Fields pertaining to the local real estate trade association.

46 fields

Building

263 fields

Caravan

Fields and lookups for the date, time, location and other particulars about caravan events.

34 fields

CaravanStop

Stops along a caravan tour, connecting Caravan records to Open House records.

26 fields

ContactListingNotes

Notes about a given listing from interactions between the contact and member within a consumer portal.

11 fields

ContactListings

Maintains the relationship between contacts and members around listings in consumer portals.

23 fields

Contacts

Information on client and other contacts of the member.

92 fields

EntityEvent

An event log offering an alternative to timestamps, providing an OData-compliant logical timestamp methodology.

5 fields

Field

Metadata about available fields on a given server in a predictable and user-friendly format.

19 fields

HistoryTransactional

A transactional history of the listing, showing before and after values of field changes.

24 fields

InternetTracking

A standard data set for recording and transfer of event-related information of real estate products.

60 fields

InternetTrackingSummary

Sum of specific tracking events over a period of time, such as listings viewed or shared.

28 fields

LockOrBox

Lockbox, smart lock and showing agent information.

45 fields

Lookup

Metadata about lookups (enumerations) available on a given server.

7 fields

Media

Photos, virtual tours, documents, supplements and other media related to listings.

43 fields

Member

Roster of agents, brokers, appraisers, assistants, affiliates and other MLS/association members.

88 fields

MemberAssociation

Joining information relating Member and Association records to each other.

32 fields

MemberStateLicense

Supports members that hold multiple state licenses.

11 fields

Model

12 fields

OUID

Organization Unique Identifier (UOI), a common ID system for organizations that exchange real estate data.

47 fields

Office

Roster of offices who are members of the MLS and/or association.

74 fields

OfficeAssociation

Joining information relating Office and Association records to each other.

24 fields

OfficeCorporateLicense

Supports offices that hold multiple state licenses.

11 fields

OpenHouse

Fields commonly used to record an open house event.

34 fields

OtherPhone

Additional phone numbers for contacts or members, with type information.

11 fields

Property

Fields commonly used in a Multiple Listing Service (MLS) listing.

742 fields

PropertyGreenVerification

Multiple performance ratings applied to a property listing.

16 fields

PropertyPowerProduction

Different means of producing power on a property, such as solar and wind systems.

13 fields

PropertyPowerStorage

Different means of storing power on a property.

7 fields

PropertyRooms

Detailed information about separate rooms in a property.

20 fields

PropertyUnitTypes

Unit type details for residential income and multifamily properties.

18 fields

Prospecting

Automatic email connecting Contacts and SavedSearch resources to send results matching saved search criteria.

32 fields

Queue

Events that have occurred with records in other resources.

17 fields

RelatedLookup

3 fields

Rules

Business and system rules transmitted from host to client application.

29 fields

SavedSearch

Saved search criteria and related data.

28 fields

Showing

45 fields

ShowingAppointment

Fields associated with showing appointments, including method, date, time and more.

13 fields

ShowingAvailability

Fields associated with property availability for showings, including method, dates and duration.

13 fields

ShowingRequest

Fields associated with showing requests, including method, date, time and more.

18 fields

SocialMedia

Social media accounts for members, offices, contacts and other entities.

11 fields

TeamMembers

Fields tying Member records to related Teams records.

22 fields

Teams

Name and other information about teams of members who work together.

46 fields

TransactionManagement

Tracking different types of transactions such as listing for sale or listing for lease.

5 fields
Terms and DefinitionsGenerated April 22, 2026
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