If you have a set of records that are not expected to change over time you may can build your database without record IDs. This indexing method uses less space than the other methods and is simple to use.
   To use this method, you simply omit the recordId entry
   for the group of files that you index. To add a set of records you use
   zebraidx with the update command. The
   update command will always add all of the records that it
   encounters to the index - whether they have already been indexed or
   not. If the set of indexed files change, you should delete all of the
   index files, and build a new index from scratch.
  
   Consider a system in which you have a group of text files called
   simple.
   That group of records should belong to a Z39.50 database called
   textbase.
   The following zebra.cfg file will suffice:
  
    profilePath: /usr/local/idzebra/tab
    attset: bib1.att
    simple.recordType: text
    simple.database: textbase
   
Since the existing records in an index can not be addressed by their IDs, it is impossible to delete or modify records when using this method.