Index: /trunk/doc/manual/Makefile.kmk
===================================================================
--- /trunk/doc/manual/Makefile.kmk	(revision 56510)
+++ /trunk/doc/manual/Makefile.kmk	(revision 56511)
@@ -102,6 +102,8 @@
 ifdef VBOX_XML_CATALOG
  VBOX_XSLTPROC_WITH_CAT    = $(REDIRECT) -E "XML_CATALOG_FILES=$(VBOX_XML_CATALOG)" -- $(VBOX_XSLTPROC)
+ VBOX_XMLLINT_WITH_CAT     = $(REDIRECT) -E "XML_CATALOG_FILES=$(VBOX_XML_CATALOG)" -- $(VBOX_XMLLINT)
 else
  VBOX_XSLTPROC_WITH_CAT    = $(VBOX_XSLTPROC)
+ VBOX_XMLLINT_WITH_CAT     = $(VBOX_XMLLINT)
 endif
 
@@ -664,6 +666,7 @@
 validatemanual_$(lang): \
 $$(addprefix $(VBOX_PATH_MANUAL_OUTBASE)/$(lang)/,$(VBOX_MANUAL_XML_FILES_INCL_CHANGELOG)) \
-		$$(MAKEFILE_CURRENT)
-	$$(QUIET)$(VBOX_XMLLINT) --dtdvalid $$(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd --xinclude --noout $$(filter %.xml,$$^)
+		$$(VBOX_XML_CATALOG) $$(VBOX_XML_CATALOG_DOCBOOK) $$(MAKEFILE_CURRENT)
+	$$(QUIET)$(VBOX_XMLLINT_WITH_CAT) $(VBOX_XMLLINT_OPTS) --dtdvalid $$(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd \
+		--xinclude --noout $$(filter %.xml,$$^)
 endef
 
@@ -715,6 +718,7 @@
 # validate SDK manual
 validatesdkref: $(addprefix $(VBOX_PATH_MANUAL_OUTBASE)/en_US/,$(VBOX_SDKREF_XML_FILES)) \
-		$(MAKEFILE_CURRENT)
-	$(QUIET)$(VBOX_XMLLINT) --dtdvalid $(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd --xinclude --noout $(filter %.xml,$^)
+		$(VBOX_XML_CATALOG) $(VBOX_XML_CATALOG_DOCBOOK) $(MAKEFILE_CURRENT)
+	$(QUIET)$(VBOX_XMLLINT_WITH_CAT) $(VBOX_XMLLINT_OPTS) --dtdvalid $(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd \
+		--xinclude --noout $(filter %.xml,$^)
 
 
@@ -931,6 +935,7 @@
 # validate man page XML source
 validateman: $(addprefix $(VBOX_PATH_MANUAL_SRC)/en_US/,$(VBOX_MANUAL_XML_REFENTRY_FILES)) \
-		$(MAKEFILE_CURRENT)
-	$(QUIET)$(VBOX_XMLLINT) --dtdvalid $(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd --noout $(filter %.xml,$^)
+		$(VBOX_XML_CATALOG) $(VBOX_XML_CATALOG_DOCBOOK) $(MAKEFILE_CURRENT)
+	$(QUIET)$(VBOX_XMLLINT_WITH_CAT) $(VBOX_XMLLINT_OPTS) --dtdvalid $(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd \
+		--noout $(filter %.xml,$^)