DITA maps are documents that collect and organize references to DITA topics to indicate the relationships among the topics. They can also serve as outlines or tables of contents for DITA deliverables and as build manifests for DITA projects.
Maps allow scalable reuse of content across multiple contexts. They can be used by information architects, writers, and publishers to plan, develop, and deliver content.
The default schema used for DITA map documents is located in ${frameworks}/dita/DITA-OT/dtd/map.dtd, where ${frameworks} is a subdirectory of the Oxygen XML Editor plugin install directory.
The CSS file used for rendering DITA content is located in ${frameworks}/dita/css/dita.css.
The default XML catalog is stored in ${frameworks}/dita/catalog.xml.