RESO FAQ

The Data Dictionary serves as a guideline for a North American standard for the fields and lookups in Multiple Listing Service (MLS) databases. An MLS does not need to support every field or lookup in the Data Dictionary, but if it does have a given field in the Data Dictionary it should to support that data item as defined in the Data Dictionary.

The MLS, broker and their vendor or technology partner must convert their local MLS Data (metadata) to be Data Dictionary compliant. Once the data dictionary is implemented within a MLS it will be available to the Broker and Technology communities.

Metadata is data about data. It is descriptive information about a particular data set including how it is formatted, and when and by whom it was collected.

Data Dictionary Standards