Web Map Service
1) Overview
2) Downloads
3) Official Schemas
4) Related News
1) Overview
The OpenGIS® Web Map Service Interface Standard (WMS) provides a simple HTTP interface for requesting geo-registered map images from one or more distributed geospatial databases. A WMS request defines the geographic layer(s) and area of interest to be processed. The response to the request is one or more geo-registered map images (returned as JPEG, PNG, etc) that can be displayed in a browser application. The interface also supports the ability to specify whether the returned images should be transparent so that layers from multiple servers can be combined or not.
NOTE: WMS 1.3 and ISO 19128 are the same documents.
2) Downloads
Submit a Change Request, Requirement, or Comment for this OGC standard.
3) Official Schemas
http://schemas.opengis.net/wms/
Note: You may also download All Official OGC Schemas in a single zip file.