URI values (including namespace names) used in queries should be syntactically valid URIs, which can be URLs or URNs. A processor may optionally raise this error if a URI is not syntactically valid according to the rules, which are described in RFC3986, Uniform Resource Identifiers (URI): Generic Syntax.
This error may be raised by any of the following URIs used in a query:
The namespace name in a namespace declaration (either in the prolog or in a direct element constructor)
The module location or namespace name in a module import
The target namespace of a library module
The schema location or namespace name in a schema import
The collation URI in a default collation declaration or in an order by
clause
The base URI in a base URI declaration
18.227.134.133