+ | LC_ALL=C.UTF-8 w3m -o display_charset=UTF-8 -cols 70 -dump -no-graph -T text/html > $@
+
+XSLT := xslt
+
+developers-reference.pdf: $(CURDIR)/developers-reference.pdf
+%/developers-reference.pdf: $(addprefix %/,$(SOURCES))
+ $(DBLATEX) $(@D)/index.dbk \
+ --backend=xetex \
+ --xsl-user=$(XSLT)/user_param.xsl \
+ --xsl-user=$(XSLT)/xetex_param.xsl \
+ --param=lingua=$(@D) \
+ && mv $(@D)/index.dbk.pdf $@
+
+developers-reference.epub: $(CURDIR)/developers-reference.epub
+%/developers-reference.epub: $(addprefix %/,$(SOURCES))
+ TOP=`pwd` && cd $(@D) && xmlto epub index.dbk && mv index.epub $(@F)
+
+.PHONY: pot
+pot: po4a/po/developers-reference.pot
+po4a/po/developers-reference.pot: %.dbk
+ $(TRANSLATE)
+
+ifdef LINGUA
+.PHONY: updatepo
+updatepo: po4a/po/$(LINGUA).po
+po4a/po/$(LINGUA).po: %.dbk
+ $(TRANSLATE)
+endif