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RETS Documents

Documents are available in Portable Document Format (PDF). PDF files require the free Adobe Acrobat Reader or a similar program. (Many browsers are pre-configured to display PDF files automatically.)

Please send corrections and notices of errors to the RETS document editor, editorrets.org.

  • Real Estate Transaction Standard Protocol Specification, Version 1.01
  • This document describes the RETS protocol and transaction set. It does not include the DTDs, which are separate from the protocol.
  • PDF version (9 June 2002, 1.27 MB)
  • List of changes from previous version
  • Real Estate Transaction Standard Protocol Specification, Version 1.5, Second Edition
  • This document describes the RETS protocol and transaction set and is the latest production standard.
  • PDF version (8 December 2003)
  • Draft 1 of the RETS Protocol Version 1.7 is also available. This is the next version of the standard.
  • Real Estate Transaction Standard XML DTD
  • The XML Document Type Definition for exchanging real estate information with RETS. (Note: The plain text version contains the DTD itself with no explanatory text. Due to a bug in Microsoft Internet Explorer 5.0, you must download the plain-text DTD to disk before viewing it. Use right-click/Save to disk… on the PC, or press/Save to disk… on the Macintosh.)
  • PDF version (1 October 2000, 47 KB)
  • Plain text version (1 October, 2000, 12 KB)
  • The RETML DTD for RETS 1.5 is available in plain text and Microsoft Word format.
  • The data dictionary for the RETML DTD for RETS 1.5 is available in both Adobe PDF and Microsoft Excel format.
  • Real Estate Transaction Standard Metadata DTD
  • The XML Document Type Definition for exchanging metadata between systems or between clients and servers. (Note: The plain text version contains the DTD itself with no explanatory text. Due to a bug in Microsoft Internet Explorer 5.0, you must download the plain-text DTD to disk before viewing it. Use right-click/Save to disk… on the PC, or press/Save to disk… on the Macintosh.)
  • PDF version (1 October 2000, 114 KB)
  • Plain text version (1 October, 2000, 12 KB)
  • The RETS Metadata DTD for RETS 1.5 is available in annotated MSWord format and plain text format.
  • RETS White Paper
  • An executive summary for RETS and the RETS DTD, providing an overview of the technology and intended operation of RETS-based systems.
  • PDF version (184 KB)
  • Frequently-Asked Questions
  • A list of frequently-asked questions. This is the same list as is available on-line, in a more portable form.
  • PDF version (10 November, 1999, 135 KB)