There are two broken links that appear in java.xml.
http://jclark.com/xml/xmlns.htm used twice in `java.xml/javax/xml/namespace/QName.java`
https://www.oasis-open.org/committees/download.php/14809/xml-catalogs.html which has 7 occurrences under `java.xml.catalog` in package-info, CatalogueFeatures, Catalog, CatalogManager, CatalogueResolver, Normalizer.
http://jclark.com/xml/xmlns.htm used twice in `java.xml/javax/xml/namespace/QName.java`
https://www.oasis-open.org/committees/download.php/14809/xml-catalogs.html which has 7 occurrences under `java.xml.catalog` in package-info, CatalogueFeatures, Catalog, CatalogManager, CatalogueResolver, Normalizer.