Errors when building FreeBSD web site

Sun Jan 20 15:59:20 UTC 2019

While following the fdp-primer, I tried to build the FreeBSD web site by
downloading doc, going into /htdocs and then "make all" or "make
WEB_ONLY=yes all" only to get the following error:

make FORMATS="html-split" WEB_ONLY=yes
env
XML_CATALOG_FILES="file:///usr/home/rob/org/en_US.ISO8859-1/htdocs/catalog-cwd.xml
file:///usr/home/rob/org/en_US.ISO8859-1/share/xml/catalog.xml
file:///usr/home/rob/org/share/xml/catalog.xml
file:///usr/local/share/xml/catalog" /usr/local/bin/xmllint  --xinclude
--valid --noout --nonet about.xml
I/O error : Attempt to load network entity
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd
file:///usr/home/rob/org/share/xml/xhtml10-freebsd.dtd:143: warning: failed
to load external entity "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
%html.orig;
           ^
file:///usr/home/rob/org/share/xml/xhtml10-freebsd.dtd:147: validity error
: PEReference: %attrs; not found
  %attrs;
         ^
about.xml:7: element html: validity error : No declaration for attribute
xmlns of element html
<html xmlns="http://www.w3.org/1999/xhtml">
                                          ^
about.xml:9: element title: validity error : No declaration for element
title
      <title>&title;</title>
                            ^
The site builds what it can, I'm able to view the index page and community
page locally. I don't understand why there is an index.xsl file, which
builds into index.xml, but no about.xsl while an about.xml exists.