Hi Michael,
Thanks
I've looked into it in a bit more detail. For general web citations, the Dublin Core is appropriate - as an exercise, I customised the headers on my Wordpress blog to generate the necessary metadata automatically and Zotero correctly stores the reference as a blog post. See an example: http://blog.matbury.com/2015/04/13/online-cognitive-apprenticeship/ and view the page source. The metadata is in the head section.
For academic journal and paper citations, they use a different metadata schema. As an example, I took the information from this entry in research.moodle.net: http://research.moodle.net/mod/data/view.php?d=1&rid=67 and converted it, as best I could, into the appropriate metadata schema (attached).
<head>
<!-- start of citation metadata -->
<meta name="citation_doi" content="" />
<meta name="citation_journal_title" content="Proceedings of the 1st Moodle Research Conference (MRC2012)" />
<meta name="citation_title" content="A Community approach to staff development in eLearning" />
<meta name="citation_keywords" content="eLearning" />
<meta name="citation_keywords" content="capacity building" />
<meta name="citation_keywords" content="staff development" />
<meta name="citation_keywords" content="Community of Practice" />
<meta name="citation_keywords" content="tertiary" />
<meta name="citation_keywords" content="New Zealand" />
<meta name="article_references" content="Roder, T. & Rata-Skudder, N. (2012), A Community approach to staff development in eLearning. In Proceedings of the 1st Moodle Research Conference (MRC2012), Retalis, S. & Dougiamas, M. (Eds), 8-16." />
<meta name="citation_publisher" content="Moodle Research???" />
<meta name="citation_language" content="en" />
<meta name="citation_volume" content="" />
<meta name="citation_issue" content="" />
<meta name="citation_firstpage" content="8" />
<meta name="citation_lastpage" content="16" />
<meta name="citation_issn" content="" />
<meta name="citation_publication_date" content="2012/09/15" />
<meta name="citation_online_date" content="2013/05/01" />
<meta name="citation_author" content="Roder, T;Rata-Skudder, N" />
<meta xmlns="http://www.w3.org/1999/xhtml" name="citation_author_institution" content="Te Puna Ako - eLearning team, Unitec Institute of Technology, New Zealand" />
<meta name="citation_author" content="Roder, Tabitha" />
<meta xmlns="http://www.w3.org/1999/xhtml" name="citation_author_institution" content="Faculty of Social and Health Sciences, Unitec Institute of Technology, New Zealand" />
<meta name="citation_author" content="Rata-Skudder, Nicoletta" />
<meta name="citation_abstract_html_url" content="http://research.moodle.net/mod/data/view.php?d=1&rid=67" />
<meta name="citation_fulltext_html_url" content="" />
<meta name="citation_pdf_url" content="http://research.moodle.net/pluginfile.php/15/mod_data/content/670/A%20Community%20approach%20to%20staff%20development%20in%20eLearning.pdf" />
<!-- end of citation metadata -->
</head>
I hope this helps!