>   URLib stands for Uniform Repositories for a Library.

>   The virtual library consists of a collection of documents.

The documents are directories named doc.

>   A      consists of a set of files or directories.

Example:

There is no file format restriction.

>   When looking over the document in a doc directory, the first file to be opened is called the target file.

In the above example, the target file is the file called tag.html. The name of the target file can be different. Its name is defined in the a.bib file (see page id 1).