11. One or more storage media storing instructions for sharing one or more token vocabularies among a plurality of separate database systems, wherein the instructions, when executed by one or more processors, cause: storing the one or more token vocabularies in a repository, wherein: each token vocabulary of the one or more token vocabularies corresponds to an XML schema; each token vocabulary of the one or more 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 one or more 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, wherein the second database system is different than the first database system; in response to the second request, retrieving a second token vocabulary, of the one or more token vocabularies, from the repository; and sending the second token vocabulary to the second database server.
11. One or more storage media storing instructions for sharing one or more token vocabularies among a plurality of separate database systems, wherein the instructions, when executed by one or more processors, cause: storing the one or more token vocabularies in a repository, wherein: each token vocabulary of the one or more token vocabularies corresponds to an XML schema; each token vocabulary of the one or more 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 one or more 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, wherein the second database system is different than the first database system; in response to the second request, retrieving a second token vocabulary, of the one or more token vocabularies, from the repository; and sending the second token vocabulary to the second database server. 13. The one or more storage media of claim 11 , wherein a database of the first database system includes the repository.