How to modify static pages
The static web pages are created by combining the .xpage files from /opt/eprints3/archives/ARCHIVEID/cfg/lang/en/static/ with the site template. The template can be found at opt/eprints3/archives/ARCHIVEID/cfg/lang/en/templates. This is what generate_static does.
Generate static also copies all files which do not have the suffix .xpage from /opt/eprints3/archives/ARCHIVEID/cfg/lang/en/static/
Non-language specific files go in the /opt/eprints3/archives/ARCHIVEID/cfg directory and appear on the website no matter what language the site is in. eg. images and the style sheet.
Obviously french source files go in cfg/lang/fr/ etc.
Edit the .xpage file (or other file in /static/)
Run generate_static ARCHIVEID
The XML Editor encodes all extended characters, with the exception of core HTML ones (e.g. <) -- this causes issues with pages that need to include one of these symbols. See https://github.com/eprints/eprints/blob/3.3/perl_lib/EPrints/Plugin/Screen/Admin/Config/Edit/XML.pm#L29
A set of phrases have been created for html entites to be used in static pages and phrases that can be edited through the front-end tools. E.g:
<p>Nuts <epc:phrase ref='entity_amp'/> bolts</p>