====== Typed links ======

Make it possible to have a type on a link. THis creates triplets of nodes like in RDF.

in www jargone the "rel" property is used for typed links
"type" is reserved for mime

See http://www.w3.org/TR/html4/types.html#h-6.1 for examples of possible types

For zim put Next / Prev / Start / ... in the list as "_Next", "_Prev" etc.
Hide them from for example a mindmap view.
Use them for a WWW frontend etc.
These are not cached as internal links.

Embedded images are special links - should fit into type framework.
Similar for inclusion of paragraphs from other docs or pages.

Annotations would be like "reversed" links where the end-point links to the origin.
Even this can be covered with a type or a property of a type.
In WWW jargon we have a "rev" property complementary to "rel"
