Topic IDs, context numbers and keywords are grouped together in this chapter because they are all used for locating things in your help files.

Topic IDs and context numbers are used as the "addresses" of topics, both for links within your help files and for context-sensitive calls to your help file from applications.

Keywords are used for generating index entries, which are also hyperlinks to topics in electronic help files. In addition to this there are also special keywords called "A-keywords" can also be used to create other kinds of links, including See Also... links to related topics and links between different help files.