Metadata identifiers and XML elements used by Phenex to embed annotations with NeXML documents.

Identifiers in the http://vocab.phenoscape.org/ namespace are intended to be replaced with community standards as they become available.http://vocab.phenoscape.org/ 命名空间（namespace）内的标识符，其设计目标为在对应社区标准出台并可用后，替换为符合社区标准的标识符。