Introduction

Applications often have to manage groups of strings in which each string represents some object. Typical examples of the contents of such groups may be:

• Names of astronomical objects.
• File names.
• Lists of wavelengths of spectral lines.

The GRP package provides facilities for managing the storage and retrieval of strings within such groups. Applications may explicitly specify strings to be stored within a group, or instead may specify the name of a text file from which to read such strings. The contents of a group may be written out to a text file, providing an easy means of passing groups of objects between applications.