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https://issues.apache.org/jira/browse/XMLSCHEMA-35?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14124565#comment-14124565
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Michael Pigott commented on XMLSCHEMA-35:
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Hi Martin,
I'm not sure if you want me to reply to either the dev mailing list, the
JIRA ticket, or both - so I'll reply to both. The specific problem I'm having
is I want to parse XBRL documents. XBRL is an XML format for companies to
report their quarterly & annual financial reports in, with the intent of making
it easier for government agencies to detect fraudulent statements.
The base XBRL schema is here:
http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd. It contains the
following import statement:
<import namespace="http://www.xbrl.org/2003/linkbase";
schemaLocation="xbrl-linkbase-2003-12-31.xsd"/>
As expected, the XML Schema for the linkbase namespace can be found at
http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd. So far so good.
However, the Securities and Exchange Commission (the U.S. regulatory agency for
companies on the stock market) defines their own extensions to the XBRL Schema
here: http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd
This XML Schema contains multiple import statements, including:
<xs:import namespace="http://www.xbrl.org/2003/instance";
schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
<xs:import namespace="http://fasb.org/us-types/2013-01-31";
schemaLocation="us-types-2013-01-31.xsd"/>
Now we have a problem. The following schemas need to be reached:
http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd
xbrl-linkbase-2003-12-31.xsd (base URI of http://www.xbrl.org/2003/)
http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd
us-types-2013-01-31.xsd (Base URI of http://xbrl.fasb.org/us-gaap/2013/elts/)
This is the problem I ran into, that XmlSchemaMultiBaseUriResolver solves.
Thanks,
Mike
> Multiple-Base URI Resolver
> --------------------------
>
> Key: XMLSCHEMA-35
> URL: https://issues.apache.org/jira/browse/XMLSCHEMA-35
> Project: XmlSchema
> Issue Type: New Feature
> Affects Versions: 2.1.0
> Reporter: Michael Pigott
> Labels: PatchAvailable
> Fix For: 2.1.1
>
> Attachments: diff_multi_base_uri_resolver.zip
>
>
> When working with schemas across multiple namespaces and source URIs,
> multiple XML Schemas may be given relative paths, but DefaultURIResolver only
> supports one base URI.
> XmlSchemaMultiBaseUriResolver collects the base URIs of all schemas
> encountered, and when a relative path is requested, will search all of the
> base URIs looking for the XML Schema. This search is conducted in
> reverse-chronological-order of base-URI-added.
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