Using XML Catalogs in XMLSpy

Jerry Sheehan has recently posted a useful article "A simple way to re-direct schema locations in XMLSpy using XML Catalogs" on his XML Scoop blog. In it he describes how to extend the CustomCatalog.xml file in your installation directory to redirect PUBLIC or SYSTEM identifiers in DTDs as well as URI references in XML Schemas to local copies of frequently-used schemas or DTDs to reduce loading time. XML Catalog support in XMLSpy is based on OASIS XML Catalogs.