SLD COMMON ELEMENTS version 1.0.20 (2010-02-01) SLD is an OGC Standard. Copyright (c) 2001,2010 Open Geospatial Consortium, Inc. All Rights Reserved. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ . The "VersionType" merely restricts the version string that may be used with XML documents based on this schema. A "Description" gives human-readable descriptive information for the object it is included within. An "OnlineResource" is typically used to refer to an HTTP URL. "InlineContent" is XML- or base64-encoded encoded content in some externally-defined format that is included in an SLD in-line.