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. first in the field, and only one such integer is allowed. For example, to specify 285 as the output concept number, one writes = 285 for the output concept number field; ii) if no definite integer is given, at least one subfield consisting of the letter `1N" followed by an integer must appear. Fach such integer identifies a node in the tree whose concept number is used as an output concept number. No nodes numbered above 15 may be referred to in this way; iii) normally, a pre-assigned ttkeyt1 node in the tree receives the output concept number. In Table 6 this key node is marked with a * for each type. If the user wishes to assign the output concept number to another node or nodes he may do so by punching a period followed by the number of the node to which the concept number is assigned. Any number of periods followed by integers (the integers must be smaller than 15) may be punched. A period not followed by an integer suppresses the weight assignment to the key node. For example, if it is desired to change the assignment from the key node to node number 3, the user would punch .3. in this subfield, iv) normally, the output concept numbers are given equal weights, assigned in such a way that the total weights of each phrase are equal. If SYNWT 1.0 is specified, the total weight of each phrase will be equal to the weight of one word occur- rence (assuming the normal STE[OCRerr]T 1.0). However, the user may punch a subfield consisting of an asterisk followed by an integer. The output concept number of this field will then be assigned a weight specified by this integer. The integer may be zero; it must be less than seven. Normally, weighting with one output concept number per phrase corresponds to an integer specification of [OCRerr]. To halve the weights, specify 3; to double them, 6; and to triple them, 7. A zero specification eliminates this phrase.