SlackBuildsOrg/libraries/xml-security-c
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slack-desc
xml-security-c.info
xml-security-c.SlackBuild

The xml-security-c library is a C++ implementation of the XML Digital
Signature and Encryption specifications. The library makes use of the
Apache XML project's Xerces-C XML Parser and Xalan-C XSLT processor.
The latter is used for processingXPath and XSLT transforms.

xalan-c is an optional dependency (autodetected).