Linking related data in a document set including a plurality of books written by different groups of authors in a computer network

A computer based band system for linking data in a document set including a plurality of books, comprising:

• a tag that provides information about an information unit (iunit) from a first book, including a semantic attribute and a unique identifier;
• a tagexporter configured to export the tag to a tag repository;
• and
• a tagfinder configured to select the tag from the tag repository and import the iunit to a second book.

A network system for linking data in a document set including a plurality of books, comprising:

• a plurality of networked nodes on which the books are stored;
• and
• a network tag repository accessible to the networked nodes;
• each of the networked nodes including:
• a set of tags, each providing information about a respective information unit (iunit) from a first book stored on that node;
• a tagexporter configured to export at least a subset of the tags to the network tag repository;
• and
• a tagfinder configured to select from the network tag repository a second set of tags, each providing information about a respective iunit from a second book, and, based on the second set of tags, to import the respective iunits from the second book into any of the books stored on that node.