Complete XSD for recommendations

[Joeran]

Complete XSD for recommendations

[Joeran]

current draft for what should appear at https://api.mr-dlib.org/v1/documents/justsomettitleorID/related_documents/

<xml version="1.0" encoding="UTF-8">
<related_articles recommendation_set_id="665445334" suggested_label="Related Articles">
    <related_article recommendation_id="5524543354" document_id="exmp-thepowerofscience-4423232" original_document_id="thepowerofscience" suggested_rank="5">
        <snippet_plain>The Power of Science. A. Einstein and J Doe. Journal of Science. 4:42. 1960</snippet_plain>
        <snippet_html>&lt;span class="title"&gt;The Power of Science&lt;/span&gt;. &lt;span class="authors"&gt;A. Einstein and J Doe&lt;/span&gt;. &lt;span class="journal"&gt;Journal of Science&lt;/span&gt;. &lt;span class="volume_and_number"&gt;4:42&lt;/span&gt;. &lt;span class="year"&gt;1960&lt;/span&gt;</snippet_html>
        <click_url>https://api.mr-dlib.org/related_articles/5524543354/</document_url>
        <fallback_url>http://partner.com/library/documents/thepowerofscience/</fallback_url>
    </related_article>
</related_articles>

[Joeran]

xsd schema

mdl_outbound.xsd.txt

(github does not accept xsd files for upload, so i renamed it to ...txt. if you want to use the xsd file, please rename it back to .xsd)