18. The computer-readable medium of claim 15 , wherein the similarity criterion is a spacing criterion; wherein applying the similarity criterion to the paired candidate abbreviation and constituent term comprises: generating a first comparison term by removing all spaces from the constituent term of the pair, generating a second comparison term by removing all spaces from the candidate abbreviation, and determining a difference value by comparing the first comparison term and the second comparison term, the difference value being equal to the number of characters by which the first comparison term and the second comparison term differ; and wherein determining that the paired candidate abbreviation and constituent term satisfy the applied similarity criterion comprises determining that the difference value is less than or equal to a threshold value.
15. A non-transitory computer-readable medium storing software comprising instructions executable by one or more processing devices which, upon such execution, cause the one or more processing devices to perform operations comprising: receiving a compound term that includes multiple constituent terms, and a candidate abbreviation for the compound term; pairing, with the candidate abbreviation, a constituent term, wherein the paired constituent term is one of the multiple constituent terms that make up a portion of the compound term; applying a similarity criterion to the paired candidate abbreviation and constituent term; determining that the paired candidate abbreviation and constituent term satisfy the applied similarity criterion; and establishing that the candidate abbreviation is not an abbreviation for the compound term, based on determining that the paired candidate abbreviation and constituent term satisfy the applied similarity criterion.