Hi everyone,

While the page relations application [1] introduced the ability to draw basic relations between pages outside the page content itself, a new branch I've been 
working on [2] implements "typed relations", for instance: "The Jungle Book" "has author" "Rudyard Kipling", where each 
of these items is represented by a page, and page "has author" itself has relation "is a" with page "Relation". It is similar to 
what MediaWiki extensions such as Semantic MediaWiki [3] or Wikibase [4] propose. A documentation draft covers the approach in more details in the XWiki 
development area [5]. Since the application data has an underlying graph structure, I was wondering whether we could use the name "application-graph" 
for it, considering also the current traction that graphs seem to have [6].

  [1] 
https://extensions.xwiki.org/xwiki/bin/view/Extension/Page%20Relations%20Application/
  [2] https://github.com/xwiki-contrib/application-page-relations/tree/graph
  [3] https://en.wikipedia.org/wiki/Semantic_MediaWiki
  [4] https://en.wikipedia.org/wiki/Wikibase
  [5] https://dev.xwiki.org/xwiki/bin/view/Drafts/Graph%20Application
  [6] 
https://www.gartner.com/en/newsroom/press-releases/2019-02-18-gartner-identifies-top-10-data-and-analytics-technolo

The branch code is now installable, it comes with a simple demo around Nobel 
Prize laureates. The typed relations are managed by dedicated Solr fields and 
the application implements a generic graph API that I came up with [6] because 
I couldn't find one with the needed features among the existing libraries such 
as Apache Giraph [7] or JGraphT [8].

  [6] 
https://github.com/xwiki-contrib/application-page-relations/tree/graph/java/src/main/java/org/xwiki/graph
  [7] http://giraph.apache.org/
  [8] https://jgrapht.org/

What do you think about this approach? Do you have anything against adopting the name 
"application-graph"? Would it make sense in your opinion to host the graph API 
it contains under the xwiki-commons namespace?

Cheers

Stéphane

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