1. A method for sharing a plurality of token vocabularies among a plurality of separate database systems, the method comprising: storing the plurality of token vocabularies in a repository, wherein: each token vocabulary of the plurality of token vocabularies corresponds to a different XML schema; each token vocabulary of the plurality of token vocabularies defines a plurality of associations between XML elements and replacement values; the repository is accessible to the plurality of separate database systems; and each database system, of the plurality of separate database systems, comprises one or more database servers that are designated to managing one or more databases; receiving, from a first database server of a first database system of the plurality of separate database systems, a first request for a token vocabulary; in response to the first request, retrieving a first token vocabulary, of the plurality of token vocabularies, from the repository; sending the first token vocabulary to the first database server; receiving, from a second database server of a second database system of the plurality of separate database systems, a second request for a token vocabulary; in response to the second request, retrieving a second token vocabulary, of the plurality of token vocabularies, from the repository; and sending the second token vocabulary to the second database server.