ph-schematron-ant-task/src/main/java/com/helger/schematron/ant/Schematron.java
public void addConfiguredXMLCatalog (@Nonnull final XMLCatalog aXmlCatalog)
  {
    m_aXmlCatalog.addConfiguredXMLCatalog (aXmlCatalog);
    log ("Added XMLCatalog " + aXmlCatalog, Project.MSG_DEBUG);
  }
public void addConfiguredXMLCatalog (@Nonnull final XMLCatalog aXmlCatalog)
  {
    m_aXmlCatalog.addConfiguredXMLCatalog (aXmlCatalog);
    log ("Added XMLCatalog " + aXmlCatalog, Project.MSG_DEBUG);
  }
Add the catalog to our internal catalog

@param aXmlCatalog
the XMLCatalog instance to use to look up DTDs