IMGT keywords for IG, TR and MHC include the following:
- General keywords: indispensable for sequence assignments, they are described in an exhaustive and nonredundant list, and are organized in a tree structure;
- Specific keywords: they are more specifically associated to particularities of the sequences (orphon, transgene ...) or to diseases (leukemia, lymphoma, myeloma ...).
The list is not definitive and new specific keywords can easily be added if needed. IMGT standardized keywords have been assigned to all entries.