METS Java Toolkit / Validation
Draft Version 1.0 (alpha) 2002/03/15

Validation occurs at both the global (document scope) and local level (element scope).

1. Global Validation
   1. ID uniqueness
   2. IDREF-to-ID consistency, i.e., all IDREFs refer to existing IDs
2. Local Validation
   1. Attribute type correctness
   2. Existence of required attributes
   3. Content model (sequence, choice, etc.)

Note: In the current implementation, the IDREF-to-ID consistency validation is performed using an mechanism that is an extension to JAXB.

Note: In the current implementation, the ordering of sequential content model elements is not validated.