Abstract
Terms from the HELP System's vocabulary were matched with Meta-1 terms on a word by word basis as well as on a phrase by phrase basis with the goal of exploring what steps might need to be taken if some future version (Meta-N) of the Metathesaurus were to be used to represent clinical data. Word by word matching revealed that 54% of HELP words were present in Meta-1, while 8% of HELP phrases had a corresponding phrase. The words that did not match in HELP were mostly adjectives and adverbs after taking into account misspellings and abbreviations. Phrase matches were low because of the inclusion of adjectives and adverbs in HELP clinical terms. If some future version of the Metathesaurus is to be used for representation of clinical data additional terms are needed as well as a grammar that permits construction of clinical phrases that include modifiers and time references.
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