The paper deals with one method of organizing the storage unit of a descriptor IPS (information retrieval system) of the SPOD type, the information array of which constitutes the totality of uniform documents with ordered disposition of data within each of them. Three categories of data composing the retrieval form of document were defined classificational, base and key. For the organization of retrieval in a group of documents with a common series of similar data, use is recommended of the process which can be automated by including a free, ordered table in the Automatic Dictionary of Translation from the natural language to the IPYA (information retrieval language). Organization of the information storage unit anticipates the inclusion in each of its subcriteria. The SPOD ensures output of data which corresponds to the level shown in the request, as well as data below this level, but pertaining to a higher section of the document. (Author)