The Standardized Vocabularies are constructed with a few principles in mind. Not every principle has been executed to perfection, but it represents a general motivation and direction of the ongoing improvement and development process:
It is important to note that these critera have the purpose to serve observational research. In that regard the Standardized Vocabularies differ from large collections with equivalence mappings of concepts such as the UMLS, which supports indexing and searching of the entire biomedical literature. UMLS resources have been used heavily as a basis for constructing many of the Standardized Vocabulary components, but significant additional efforts have been made to adjust the framework:
However, significant work needs to be done to achieve all the criteria in all of the Domains. Currently, for the complex and non-administrative Domains we can achieve the following compliance:
|Domain||Standardization||Unique Concepts||Reliable Domains||Comprehensive Coverage||Hierarchy||Mapping|
|Drug||x||x||In US, other countries in process||x||x||x|
The Life Cycle is implemented for all Concepts, and its rules are described in the CONCEPT table description and in the discussion of the individual vocabularies (if there are specific rules, but this is rare).