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ResourceDefinitionStatus ChangeRevisionModification
PropertyThe Property Resource includes fields commonly used in a Multiple Listing Service (MLS) listing. Notice that some fields are grouped together for viewing convenience, like Business Group.2019-01-242019-02-022019-02-02
MemberThe roster of agents, brokers, appraisers, assistants, affiliates., etc. who are members of the MLS and/or association of REALTORS®.2018-12-262018-12-052018-12-26
OfficeThe roster of offices who are members of the MLS and/or bssociation of REALTORS®.2018-12-262018-12-052018-12-26
ContactsClient and other contacts of the member.2018-12-262019-01-2320190123
ContactListingsConsumer Portals are a common place where the Contact and Member interact around listings. The ContactListing Resource is used to maintain that relationship from Contact to Listing. This resource connects the Contacts and Property resources and provides for other information used to maintain the details about the client and member's interaction around the given listing.2018-12-262019-08-282019-08-28
MediaThe database and informational representation of media, such as photos, virtual tours, documents/supplements, etc.2018-12-262018-12-052018-12-26
HistoryTransactionalThe transactional history of the listing. A separate record is generated showing the before and after value of any change to each field.2017-08-092018-06-022018-06-02
InternetTrackingThe Internet Tracking Resource provides a standard data set for the recording and transferring of event-related information from real estate products. This allows the participant to monitor and review their real estate data on a grander scale, quickly and efficiently (i.e., listing views from multiple products).2018-12-262018-10-092018-12-26
SavedSearchThis is a means to communicate the saved search criteria and other relative data as it relates to saved search.2017-08-092019-08-282019-08-28
OpenHouseThese are the fields commonly used to record an open house event.2018-12-262019-06-272019-06-27
ProspectingAlso known as Auto Email or Auto Mail, the Prospecting Resource contains the fields supporting a connection between the Contacts and Saved Search resources along with the other fields used to send email to the client when the related saved search criteria locates results in the data being queried by the Saved Search Criteria.2017-08-092017-05-022017-08-09
QueueThe Queue Resource is used to represent events that have occurred with records that exist in other resources. A common use case is the deletion or "kill" of a listing record. This resource can be used to show the identity of the deleted record and when it was deleted and for other events such as record additions or modifications.2018-12-262018-05-122018-12-26
RulesThis is a flexible resource that can be used to transmit business and system rules from host to client application. These rules may be meant for human consumption (e.g., REBR), in which case the client may be a tool allowing a person to review the business rules. The rules may also be meant for machine consumption (e.g., Rets Validation) where the rules are structured to be consumed and executed upon by the client application without human intervention.2018-12-262018-05-122018-12-26
ShowingThe Showing Resource is a set of fields that facilitate the passing of scheduled showing events. This resource connects the Listing to the Member who requested the showing and provides the date and time of the showing.2017-08-092017-05-022017-08-09
TeamsThe Teams Resource covers the name and other information about teams of members who work together.2018-12-262018-10-092018-12-26
TeamMembersThe TeamMembers Resource accounts for key fields that tie records from the Members Resource to the related records in the Teams Resource.2018-12-262018-10-092018-12-26
OUIDThe Organization Unique Identifier (OIUD) Resource – soon to be known as the Unique Organization Identifier (UOI) – provides a common ID system for entities that exchange data in the real estate space.2018-12-262017-10-262018-12-26
ContactListingNotes(Collection) Adding notes about a given listing are a common interaction between the Contact and Member within a consumer portal. ContactListingNotes is a "sub-table" to the ContactListings Resource. This sub-table allows for multiple notes from the Contact or the Member to be stored around a given Listing.2018-12-262017-10-032018-12-26
OtherPhone(Collection) Some systems may allow the input of more than one "other" phone for a given contact or member. In those cases, a collection may be used for any number of other phone numbers with information about what type of number is included.2018-12-262017-10-262018-12-26

(Collection) Properties can have a number of different performance ratings applied to them. This resource allows the relation of multiple ratings to the given individual listing.

PropertyPowerProduction(Collection) A property might have a number of means of producing power, whether different systems, like a solar and wind system, or more than one of a given system, like two different solar systems. This separate resource allows for the relation of multiple power production systems to a single property.2017-08-092017-05-242017-08-09
PropertyRooms(Collection) In cases where detailed information about separate rooms in a property are collected, this data is commonly stored in a relational table. This prevents an overly wide property table and also allows for an unlimited number of rooms that can be detailed.2018-12-262018-06-012018-12-26
PropertyUnitTypes(Collection) With Residential Income, aka Multifamily properties, each type of unit can have a number of describing fields. In cases where the number of unit types grows, a relational structure is important.2017-08-092017-05-242017-08-09
SocialMedia (Collection) Some systems may allow for the input of more than one type of social media for a given member, office, contact, etc. In those cases, a collection of social media records may be related to the member, office or other kind of record. 2018-12-262018-05-232018-12-26
Lookup Fields and ValuesA list of Enumeration (Lookup) fields with defined lookup values included in the Data Dictionary. 2019-11-252019-11-252019-11-25
Deprecated FieldsThese fields were valid at some point but are no longer supported in this version.2017-01-202017-01-172017-01-20
Deprecated Lookup ValuesThese lookup values were valid at some point but are no longer supported in this version.2018-08-222016-08-232018-08-22

Most Recent Date2020-11-192020-11-192020-11-19

Certification Level Counts (Relevant Prior to Data Dictionary 1.7)

Certification LevelTotal Fields per Certification Level 

Change Counts

Change TypeTotal Proposed and Deprecated 
Proposed Field Additions/Changes1
Proposed Field Deprecations7
Proposed Lookup Additions/Changes1
Propose Lookup Deprecations1

Resource Field Counts

 ResourceTotal Fields*
Deprecated Fields7
Deprecated Lookup Values1

Lookup Fields and Values


* Active, Proposed, Deprecated

Property Type Field Counts

Property TypeTotal Fields*
Residential Lease486
Residential Income (Multi-Family)515
Manufactured in Park502
Commercial Sale414
Commercial Lease415
Business Opportunity329

* Active, Proposed, Deprecated

Unique Identifiers Highest Number

IDMax Number
Field RecordID470027
Lookup FieldID474000

Page Revision Date: November 19, 2020.

Form: ResourceVersionInfo