Describes the theoretical framework of a retrieval system that uses data structures called bitmaps to improve search algorithms for medium-sized systems. Information retrieval systems that contain the full text of the documents are discussed, and the use of inverted files such as concordances for small texts is explained. (24 references) (LRW)

Introduces the multicharacter trie as an index structure that can improve the time needed for retrieving full-text materials stored on CD-ROMs. The advantages of this structure compared to other structures are described, and experimental results comparing it to the widely used B+ tree and other structures used for full-text retrieval are…

Examines possible reasons for the slow adoption of full text primary literature online by users. Areas discussed include the lack of complete online files, competition with better known sources, isolation of full text files, and the slow adoption of online services in general. Possible future developments are discussed. (three references) (CLB)

Describes the method used by the American Chemical Society to keyboard its primary journals directly into a publishing database, which is then used to produce printed journals and create an online full text file. The use of a generalized mark-up format to convert journals not keyboarded in such a manner is suggested. (four references) (CLB)