This validator checks the document you paste in below to determine if ...

1. it is well-formed XML
2. it conforms to the CML Schema 3
3. it conforms to any conventions specified in the document (click here for a list of conventions currently checked)
4. all the prefixes used in dictRefs have been bound
5. all the dictRef values are URLs

The validator will also give warnings if deprecated constructs are used (e.g. orders should not use numeric values).