CRISTAL Data Links:

The ability to provide "data links" allows CRISTAL to integrate
various types of information into a common reference database. 
Different data types can be linked together by implementing a
unique set of macro commands.  These macros include operations
for loading or saving a spreadsheet, image, or text file, sorting
and querying a range of cells to form a database, and a menu
subroutine to provide users with selection lists to facilitate
access to information.  Links between data files are created by
coordinating the execution of a macro sequence that activates
these files when specified conditions are met.    

An example of a data link system is the CRISTAL resource database
that was created for the National Park Service (NPS).  This Mt.
Rainier National Park (MORA) prototype consists of images and
associated text information describing the park's historic
building resources.  The prototype CRISTAL System is described in
Section 4.2.0.

<cfile22>   Authoring Systems Using Macro Commands
<cfile23>   CRISTAL System Macros
<cfile31>   Hypertext Construction
<dfile37>   CRISTAL: Introduction
<dfile48>   CRISTAL: Data Links