diff --git a/.github/workflows/xep-validation.yml b/.github/workflows/xep-validation.yml
index 34ee09cd..76731bf5 100644
--- a/.github/workflows/xep-validation.yml
+++ b/.github/workflows/xep-validation.yml
@@ -31,5 +31,11 @@ jobs:
             if ! tools/validate-xep0001-conformance.sh "$xep"; then
               result=1
             fi
+            if [[ ${xep} == xep-* ]]; then
+              echo Checking ${xep} by invoking \"make .${xep}.check.ok\"
+              if ! make ".${xep}.check.ok"; then
+                result=1
+              fi
+            fi
           done
           exit $result
diff --git a/.gitignore b/.gitignore
index e8200919..f8b40f4d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -75,3 +75,5 @@ Session.vim
 /tools/xeps-email.conf
 /tmp/
 /pr-worktree/
+
+.*.xml.check.ok
diff --git a/Makefile b/Makefile
index 051bc7bd..0eb413e9 100644
--- a/Makefile
+++ b/Makefile
@@ -36,6 +36,7 @@ xep_pdfs=$(patsubst %.xml,$(OUTDIR)/%.pdf,$(xeps))
 xep_refs=$(patsubst xep-%.xml, $(REFSDIR)/reference.XSF.XEP-%.xml, $(xeps))
 xep_examples=$(patsubst xep-%.xml, $(EXAMPLESDIR)/%.xml, $(xeps))
 
+all_xep_check_ok=$(patsubst %.xml, .%.xml.check.ok, $(xeps))
 
 .PHONY: help
 help:
@@ -46,6 +47,7 @@ help:
 	@echo '                  refs  -  build all IETF refs'
 	@echo '                  html  -  build all XEPs'
 	@echo '            inbox-html  -  build all ProtoXEPs'
+	@echo '                 check  -  check all XEPs for errors'
 	@echo '                 clean  -  recursively unlink the build tree'
 	@echo '               preview  -  builds html whenever an XEP changes (requires inotify-tools)'
 	@echo '              examples  -  extract all examples'
@@ -82,6 +84,9 @@ refs: $(xep_refs)
 .PHONY: examples
 examples: $(xep_examples)
 
+.PHONY: check
+check: $(all_xep_check_ok)
+
 .PHONY: xep-%
 xep-%: $(OUTDIR)/xep-%.html $(REFSDIR)/reference.XSF.XEP-%.xml $(OUTDIR)/xep-%.pdf $(EXAMPLESDIR)/%.xml;
 
@@ -106,30 +111,24 @@ $(EXAMPLESDIR)/%.xml: xep-%.xml $(XMLDEPS) examples.xsl | $(EXAMPLESDIR)
 $(REFSDIR)/reference.XSF.XEP-%.xml: xep-%.xml $(XMLDEPS) ref.xsl | $(REFSDIR)
 	xsltproc --path $(CURDIR) ref.xsl "$<" > "$@" && echo "Finished building $@"
 
-$(xep_htmls): $(OUTDIR)/xep-%.html: xep-%.xml $(XMLDEPS) $(HTMLDEPS) | $(OUTDIR)
+.%.xml.check.ok: %.xml
 	xmllint --nonet --noout --noent --loaddtd --valid "$<"
-	# Check for non-data URIs
-	! xmllint --nonet --noout --noent --loaddtd --xpath "//img/@src[not(starts-with(., 'data:'))]" $< 2>/dev/null && true
+	# Check for non-data URIs, the result set of the XPath expression below should be empty
+	# Disabled for now, see
+	# https://github.com/xsf/xeps/issues/1316 and https://gitlab.gnome.org/GNOME/libxml2/-/issues/673
+	# xmllint --loaddtd --xpath "//img/@src[not(starts-with(., 'data:'))]" $< > /dev/null
+	touch $@
 
-	# Actually build the HTML
+$(xep_htmls): $(OUTDIR)/xep-%.html: xep-%.xml $(XMLDEPS) $(HTMLDEPS) | $(OUTDIR)
 	xsltproc --path $(CURDIR) --param htmlbase "$(if $(findstring inbox,$<),'../','./')" xep.xsl "$<" > "$@" && echo "Finished building $@"
 
 $(proto_xep_htmls): $(OUTDIR)/inbox/%.html: inbox/%.xml $(XMLDEPS) $(proto_HTMLDEPS) | $(OUTDIR)
-	xmllint --nonet --noout --noent --loaddtd --valid "$<"
-	# Check for non-data URIs
-	! xmllint --nonet --noout --noent --loaddtd --xpath "//img/@src[not(starts-with(., 'data:'))]" $< 2>/dev/null && true
-
-	# Actually build the HTML
 	xsltproc --path $(CURDIR) --param htmlbase "$(if $(findstring inbox,$<),'../','./')" xep.xsl "$<" > "$@" && echo "Finished building $@"
 
 $(OUTDIR)/xmpp.pdf $(OUTDIR)/xmpp-text.pdf: | $(OUTDIR)
 	cp "resources/$(notdir $@)" "$@"
 
 $(OUTDIR)/%.pdf: %.xml $(XMLDEPS) $(TEXMLDEPS)
-	xmllint --nonet --noout --noent --loaddtd --valid "$<"
-	# Check for non-data URIs
-	! xmllint --nonet --noout --noent --loaddtd --xpath "//img/@src[not(starts-with(., 'data:'))]" $< 2>/dev/null && true
-
 	xsltproc --path $(CURDIR) xep2texml.xsl "$<" > "$(@:.pdf=.tex.xml)"
 	texml -e utf8 "$(@:.pdf=.tex.xml)" "$(@:.pdf=.tex)"
 	sed -i -e 's|\([\s"]\)\([^"]http://[^ "]*\)|\1\\path{\2}|g' \
diff --git a/xep-0484.xml b/xep-0484.xml
index 07027158..c57ac914 100644
--- a/xep-0484.xml
+++ b/xep-0484.xml
@@ -32,6 +32,7 @@
         <li>Promoted to Experimental.</li>
       </ul>
     </remark>
+  </revision>
   <revision>
     <version>0.0.1</version>
     <date>2022-10-19</date>