This is a repository for the Spatial Data on the Web Working Group, a collaborative project between W3C and OGC.

This repository has been factored out as a submodule of the original repository at https://github.com/w3c/sdw.

The repo is used for developing editors drafts of some of the Working Group's deliverables and related resources, in particular:

[ssn-extensions](https://github.com/w3c/sdw-sosa-ssn/tree/gh-pages/ssn-extensions)

Extensions to the SSN ontology to enable linking directly to the ultimate feature of interest alongside the link to the (proximate) feature of interest; and homogeneous collections of observations.
[Editor's Draft](https://w3c.github.io/sdw-sosa-ssn/ssn-extensions/)
[Working Draft](https://www.w3.org/TR/vocab-ssn-ext/)

[ssn-usage](https://github.com/w3c/sdw-sosa-ssn/tree/gh-pages/ssn/usage)

The implementation report for the Semantic Sensor Network Ontology, initially developed by the Spatial Data on the Web Working Group.
[Implementation report](https://w3c.github.io/sdw-sosa-ssn/ssn/usage/)

[ssn-usecases](https://github.com/w3c/sdw-sosa-ssn/tree/gh-pages/ssn/usecases)

A use cases document describing the reasons and new use cases for a proposed update to SSN in 2023.
[SSN Use cases](https://w3c.github.io/sdw-sosa-ssn/ssn/usecases/)

[ssn](https://github.com/w3c/sdw-sosa-ssn/tree/gh-pages/ssn)

The Semantic Sensor Network Ontology Recommendation
[Editor's Draft](https://w3c.github.io/sdw-sosa-ssn/ssn/)
[W3C Recommendation](https://www.w3.org/TR/vocab-ssn/)

This is a working draft with both SSN and SOSA ontology source files, examples and the specification document.

Comments are welcome as issues raised against this repository. WG members should use the primary public-sdw-wg@w3.org mailing list archive.