Following schema references in XSD schema file fails

[kevinfoote]

When trying to utilize a specific remotely fetched schema file the linter fails at trying to pull in additionally referenced XSD schema files, specifically URN based references.

Initial heading portion of the specific XSD that references other schema files.

<schema xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:xenc="http://www.w3.org/2001/04/xmlenc#" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:oasis:names:tc:SAML:2.0:metadata" elementFormDefault="unqualified" attributeFormDefault="unqualified" blockDefault="substitution" version="2.0">
<import namespace="http://www.w3.org/2000/09/xmldsig#" schemaLocation="http://www.w3.org/TR/2002/REC-xmldsig-core-20020212/xmldsig-core-schema.xsd"/>
<import namespace="http://www.w3.org/2001/04/xmlenc#" schemaLocation="http://www.w3.org/TR/2002/REC-xmlenc-core-20021210/xenc-schema.xsd"/>
<import namespace="urn:oasis:names:tc:SAML:2.0:assertion" schemaLocation="saml-schema-assertion-2.0.xsd"/>
<import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="http://www.w3.org/2001/xml.xsd"/>
<annotation>
<documentation> Document identifier: saml-schema-metadata-2.0 Location: http://docs.oasis-open.org/security/saml/v2.0/ Revision history: V2.0 (March, 2005): Schema for SAML metadata, first published in SAML 2.0. </documentation>
</annotation>
....

[ChristophWurst]

Does the validation work with xmllint outside of the action?

[kevinfoote]

Does the validation work with xmllint outside of the action?

Yes, 100% of the time