RESO Data Dictionary 2.0 — 41 resources / 1,745 fields / 3,683 lookups (ratified Oct 23 2023; effective April 15 2024)
Summary
Claim. RESO Data Dictionary 2.0 contains exactly 41 resources and 1,745 total fields. The home index lists DD 2.0 as "Approved October 23, 2023 · 41 Resources · 1,745 Fields · 3,683 Lookups," with an effective ratification date of April 15, 2024 for certification testing.
Quote.
"DD 2.0 contains 41 resources and 1,745 total fields."
Source. RESO browsable Data Dictionary (dd.reso.org/DD2.0/about/resources/; dd.reso.org home index; reso.org/product-updates), accessed 2026-06-21.
Confidence. Verified. Standards-body primary source.
Caveats. RESO's marketing page (reso.org/data-dictionary) says "more than 1,700 fields and 3,100 lookups" — rounded, non-version-specific, and should NOT be cited as the DD 2.0 lookup count. Use 1,745 / 3,683 / 41 resources for DD 2.0; flag the marketing figure as imprecise.
Implication / use. The headline architectural figure for the MLS field inventory. Anchors the "1,745 fields the typical agent never touches" narrative in Section 2.
Related entries
Referenced by (6)
- research-notes Research notes (capture-layer): inside the MLS box — what an Ontario member agent's account exposes, what goes unused, and what they're licensed to do with it (June 2026) relates-to
- reference RESO DD 2.0 — Property resource is 652 fields, organised into 13 groups relates-to
- reference RESO DD 2.0 — full resource list with field counts (Property 652, Contacts 91, Member 87, Office 73, …, TransactionManagement 4) relates-to
- reference RESO DD 2.1 — draft (44 resources / 2,167 fields / 4,140 lookups), targeted end of Q1 2026, not yet ratified relates-to
- reference RESO marketing "more than 1,700 fields / 3,100 lookups" — rounded, non-version-specific (flag) relates-to
- reference Typical agent uses a sliver of the 1,745-field MLS dataset — active search, a handful of comps for a CMA, posting their own listing relates-to