What you can contribute You do not need to be a data modeller to help improve property information. Contributors can explain the language and rules used in their work, bring authorised examples, review draft definitions and challenge assumptions. At the Open Property Data Association (OPDA), we want the definitions to reflect real work, including difficult cases. Registering is an expression of interest. OPDA reviews each submission and confirms the next steps. It does not automatically give membership or access. Find your working group: https://opda.org.uk/join #PropertyData #SPDTF