multidirectional links with XLINK
philipnye at freenet.co.uk
Wed Sep 22 12:11:07 BST 1999
"W. Eliot Kimber" wrote:
> Friedhelm Krebs wrote:
> > Reading the X-Link-Specification I found the keyword
> > multidirectional-link, but I had no idea how to realize it with X-Link.
> > What´s the difference to, for instance, two uni-directional links, one
> > on each side?
> The difference is that in the first case you are asserting one
> relationship between the two things and in the second you are asserting
> two relationships. The "directionality" of the links is merely a matter
> of behavioral style.
In theory any link has two ends and so need not be one-way. However in
the practical representation, a simple link has two ends which look
different and it is often not easy or even possible to traverse the link
in the opposite direction.
XLink uses extended links for multidirectional links. Look at sections
4.3 and 5 of the XLink draft for how this works. I do not know the
current status of XLink activity.
Engineering Arts UK
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