Version 16 (modified by Dominic König, 12 years ago) ( diff )


UUID conventions

Table of Contents

  1. General
  2. Mapping


All records in Sahana Eden which shall be shared with other instances or applications must have a universally unique identifier (UUID).

In Sahana Eden, these record UUIDs must be ASCII strings.

Eden automatically generates a UUID for each record according to the specifications in RFC4122:

All record UUIDs generated by Sahana Eden are strings in URN notation:


If a record is imported into Sahana Eden and it already has a UUID, then Eden will retain this UUID as-is (exception: local domain prefix, see below) - without any syntax validation (i.e. no specific UUID schema is required). However, for consistency reasons, we recommend to use URNs.

Some data formats (e.g. PFIF) may require a domain prefix for a UUID, followed by a slash:

Where such a domain prefix is used and it matches the local domain of the importing Sahana instance, it will be removed during import.


We need an agreed set of UUIDs for GIS Data so that we can share data more easily across systems, such as the current Pakistan data


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