Created test for p:add-xml-base.
+Test p:add-xml-base.
+Created test for p:add-xml-base.
+Test p:add-xml-base with all=true.
+Created test for p:add-xml-base.
+Test p:add-xml-base with relative=false.
+Created test for p:add-xml-base.
+Test p:add-xml-base with all=true and relative=true.
+Created test for p:add-xml-base.
+Test p:add-xml-base where the scheme changes.
+