Accession IDS Guide
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Unique identifiers assigned to ontology developers
Every term in the anatomy or developmental stage ontology is identified by a unique identifier. Under the conventions that we have already established, the syntax of a PO identifier is PO:nnnnnnn, where nnnnnnn is a zero-padded unique integer of seven digits.
In order to ensure database integrity, identifiers are never removed. Terms that are retired(deleted) from the ontology are moved into the obsolete category. To ensure that the same identifier is not used twice, each participating group will be assigned non-overlapping ID ranges and listed on this page for documentation purposes. These ranges will automatically act as (internal) identifiers for the group that submitted the term.
Group identifier range (from-to) TAIR 0000001-0005000 Gramene 0005001-0010000 IRIS-IRRI 0010001-0015000 MaizeGDB 0015001-0020000 UMSL 0020001-0025000
