404 on digital signature schema 3.1 Normative Schema...

3.1 Normative Schema and Schema Documentation reads in part:

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This schema references the following schema:
xmldsig1-schema.xsd
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The link for that schema returns a 404.

Looking at: ebcore-au-v1.0.xsd, it imports:

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<xs:import namespace="http://www.w3.org/2000/09/xmldsig#" schemaLocation="xmldsig1-schema.xsd"/>
<xs:import namespace="http://www.w3.org/2009/xmldsig11#" schemaLocation="xmldsig1-schema.xsd"/>
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Did you mean to bind: http://www.w3.org/TR/xmldsig-core1/xmldsig1-schema.xsd to two separate namespaces?

http://www.w3.org/TR/xmldsig-core1/#sec-Versions at 1.3 Versions, Namespaces and Identifiers says:

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The http://www.w3.org/2000/09/xmldsig# (dsig namespace was introduced in the first edition of this specification. This version does not coin any new elements or algorithm identifiers in that namespace; instead, the http://www.w3.org/2009/xmldsig11# (dsig11 namespace is used.
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Is there a legacy issue that requires you to declare both namespaces against the later specification? Not an objection, just curious.