ISR11 Operating Instructions for the SMART Text Processing and Document Retrieval System chapter M. E. Lesk Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. 11-33 The new library tape is written on B5. If an old tape is being updated, it is placed on A6. New data is submitted on cards, on A2, except for a new grammar, which is presented as a tape on A5. 5.1.1. Thesaurus and Suffix List Formation The thesaurus is the first file on B5 to be written. It contains a suffix list used in the lookup, followed by the thesaurus records themselves. The thesaurus and the suffix list may be introduced from cards (on A2), or from an older library tape on A6. The first data card for the update programs specifies whether the thesaurus and suffix list are on A2 or A6. This card contains a word, left-adjusted in columns 1-6, and followed by trailing blanks until column 7, which identifies those data which are on tape A2. If this word is BOTH, the thesaurus and suffix list are assumed to be on [OCRerr], and tape A6 is not read. If it is desired to skip over (without reading) a thesaurus file on the old library tape, columns 7-12 of the BOTH card should contain the word SPACE followed by a blank. If the suffix list is being submitted on cards, while the thesaurus is to be copied from A6, columns 1-6 of the first card should contain the word SUF[OCRerr]'IX. The word THES identifies the thesaurus as being on cards, while the suffix list is taken from the old tape. If both the thesaurus and the suffix list are on the old library tape, COPY is given as the control word. If the first data card contains either SUmx or BOTH, the next data deck must be the suffix list. Each suffix is punched on a separate card, beginning in column 1, and followed by blanks. Each suffix should be assigned a distinct sequence number, less than 256, which is punched right-adjusted in columns 13-15. The suffix list ends with a card con-