The OGC Web Feature Service (WFS) interface is a collection of operations (implemented as messages carried over HTTP) for retrieving and manipulating geographic features. An implementation of the OGC WFS IS allows a client to retrieve and update geospatial data encoded in Geography Markup Language (GML) from one or more Web Feature Services.

• WFS 1.1.0

Of interest:

• SLD allows user-defined symbolization of feature data
• GML an XML encoding for the transport and storage of geographic information, including both the geometry and properties of geographic features.