The links below link to two XML documents. One is a DTD version and the other is a schema version.
DTD version of Independent Living database
Schema version of Independent Living database
Both are well-formed. But the validation results vary depending on the validator used.
STG XML Validation
Validates the DTD version but does not seem to make the connection to the
schema and complains that none of the elements are defined.
DecisionSoft Schema Validator
Complains that no child element is expected after the "building" element and
warns that the schemaLocation requires an even number of URIs.
W3C XML Validator
Validates both versions but warns that schemaLocation should have two URIs.