Xml schema question

[fastmofo]

Hello there.
I have a xsd schema for courses. The schema includes course title, chapters and subchapters etc and keywords . I want this keywords to appear anywhere in the schema. In chapters, subchapters. The xml file will be stored in a database so i need this keywords to perform search.How i do this?

[erwin_78]

define this keyword element on top level of your schema and create references to this element where ever you would like to occur the keyword element.