Schema Errrors

[JimZuber]

Two issues with the Schema listings in the 1.3 version of the Core spec....

1)in the mirrormesh schema listing, "mirrormesh" is misspelled "mirromesh" and the schema will not validate.

2)The triangleset name and identifier attributes are shown in the schema as optional, but the specification states they are mandatory in section 4.1.5.1 and the spec states that they MUST not be empty. Assume the schema should show these two attributes as required.