As I mentioned in part
1, I plan to discuss major modification to my original
proposal taking into account feedback and ideas received
from a variety of sources. For this, I am currently writing, and will soon
publish, the first working draft for a link relationship profile called
“Web Communication Link Relationships”. The aim is to define
link relationships that will facilitate web communication through increased
linking semantics. This proposal, rather than focussing on rating systems,
focuses on the semantics of the links to be used by user agents in ways
that will most benefit the user.
The criteria I will use to determine which relationships are appropriate and
to make improvements includes:
- Link Relationships should express semantics to indicate at least one of:
- The semantic relationship between resources.
- The type of resource.
- The purpose of the link
- Relationship semantics should make sense in the context of any
number of user agents.
- Relationship names should accurately represent the semantics of the relationship,
- Relationship semantics should avoid expressing user-agent-implementation
From those criteria, I determined that the number and type of categories I
originally included (user
feedback, quality, accuracy, accessibility, rating and endorsement)
were mostly very inappropriate. I decided that the categories: quality, accuracy,
accessibility and rating should be removed entirely because they don’t meet
the criteria, nor were they particularly useful. This left only the
values from user feedback and endorsement; however, user feedback
is being renamed to user contribution because a contribution may not necessarily
be the result of feedback, but rather the start of a new thread, for example.
The user contribution category is designed to identify links which have been
published as a result of user contribution. It is common for several different
kinds of links to be published as a result of user contribution including user
identification (eg. User’s homepage or e-mail address), the use of a referral
mechanism (eg. Pingback or Trackback) or links contained within the user’s contribution.
As a result, I have the following relationships defined for this category:
Note: Both pingback and trackback are implementation specific referral mechanisms,
but are included because their mechanisms are so widespread and several interoperable
implementations of each already exist. See the Pingback
1.0 and Trackback specifications.
The original endorsement category is being included with the same relationships,
though their definitions are being revised. The relationships in this category
A few months ago, Derek Featherstone had an interesting discussion about tracking
the spread of ideas. In it, he discusses the common attribution method called
the “via” link, used among web-logs (in particular, link-logs) and other similar
sites for indicating where an interesting resource was found. The aim of which
is to not only find out who is linking to a particular resource, but from whereabouts
people have located it.
This is an interesting concept because news travels
rather quickly around the blogosphere, but with little indication of
the communication paths. As a result, I am including the via link within this
proposal, but I’m also extending it slightly to address some other related issues
including related links.
In the article, Derek mentions that it is difficult to semantically associate
a “via” link with the resource and illustrates a possible solution using
for attribute, yet notes that it is also invalid markup according to
the HTML specification. To address this problem, I have decided that rather
than trying to explicitly associate the “via” link with the resource, it
may be possible to implicitly do so. The full details of how will be discussed
in the draft specification, but the relationships being included within this
The final category includes relationships for identifying and tracking resources
commonly used in web communication, such as web-logs and news sites. Usually,
each article has permanent link associated with it and archival indexes
are provided for the articles. Many sites also have facilities, and designate
pages/areas, for user contributions (comments). Finally most blogs, and increasingly
news sites, provide syndication feeds for their articles, link logs and occasionally
comments. For these purposes, I’ve defined the following relationships:
Several other relationships have been suggested and considered, but so far
rejected for various reasons including not meeting the criteria or their usefulness.
Some of these include:
- Technorati defines, and uses, user-agent-implementation specific functionality
and it seems to be inappropriately named.
- Generic version of
tag, but not sure how it could be defined and used more
- Suggested to indicate links to external sites, but not sure how useful it
Feedback is welcome and I will still incorporate suggestions and revisions
into the Web Communications Link Relationship working draft before I publish
it in a few days.