As a start, make a file of the 600 top level identifiers with unique IDs. Make a second file of aliases and link each alias record to its top level Identifier using their unique ID. Each alias record will have it’s own unique id in the alias file. In the top level file, create a form for each TLI with text list or matrix that will display all the aliases associated with each top level identifier. Clicking on an alias could bring up a form with their information.