I find nothing wrong with these pragmatic definitions or descriptions of subject indexing. Purists will no doubt quibble with them on the grounds that such expressions as “indexable matter,” “relevance,” “meaning,” “associated with,” “concept,” “appropriate for,” “related to,” and “intellectual content” are not precisely defined to everyone’s satisfaction. However, if one must reach agreement on the precise definition of terms before pursuing any task, one is unlikely to accomplish much -- in indexing or any other activity.