TrackBack: Where Blogs Learn Their Places
Blogging is becoming the source for millisecond currency on the Web. When the
news that Google had decided to buy Pyra Labs, the company that pioneered some
of the earliest blogging software, was announced, it was reported essentially
live on the SiliconValley.com blog of Dan Gillmor who was sitting in the audience
with his laptop connected to his blog site. Communication in Internet time keeps
Since then blogging has become a standard tool for faculty, students, and just
about anyone who wishes to publish their thoughts worldwide. Interaction, the
ability to comment on posts of others, was a feature of the earliest blogging
tools. While commenting on the postings of others facilitates a certain amount
of communication, the threshold to form communities is still far too high. The
individual publishing paradigm of the blog has taken a turn toward community.
Eons ago in the blogsphere, let’s see, that would be about August of 2002,
the good people at the company Movable Type released a new protocol. The protocol
is based on REpresentational State Transfer, a phrase describing the essence
of the Web’s architectural style (see http://internet.conveyor.com/ RESTwiki/moin.cgi/RestArchitecturalStyle
for more information). The idea of TrackBack is to “push” communication
between posts made on different Weblogs. Here’s how it works.
Someone, let’s say Tom, has written a post on his own Weblog that comments
on a post in another person’s Weblog, say Paula’s. How d'es Paula
know or learn about Tom’s interest and reference to her post? Tom could
have gone to Paula’s Weblog and posted a note there saying he liked Paula’s
comment and wrote about it on his blog at http://toms_log.myblog.com. However,
this takes an extra degree of effort, and is just the sort of communication
barrier that keeps like-minded people from forming communities. What is needed
is a form of remote comment—rather than posting the comment directly on
Paula’s Weblog, Tom posts his comment about what Paula has written on
his own Weblog, then he sends a TrackBack ping to notify Paula.
A TrackBack ping is blogspeak for a short message sent from one Web server to
What d'es this accomplish? Paula can now list all the sites that have referenced
her erudite prose on her Web site. This lets those browsing her Weblog read
all the reactions to her posting from wherever they were written and posted
around the Web. Among those listed, of course, would be Tom’s. Because
this information is in machine-readable format (the ping message), software
tools can read them and draw the Web of interaction around this particular posted
topic automatically. The point of all this is to make explicit the connections
between ideas (postings) and minimize the effort a browsing member of the blogging
community has to expend—they don’t have to explicitly click on each
referenced blog URL to read the set of related postings about Paula’s
The TrackBack protocol is an open set of communication rules, thus letting
vendors of many different blogging engines develop their piece of comparable
TrackBack, as a form of remote commenting, is just the tip of the iceberg.
The initial purpose of the TrackBack protocol was to provide a way of aggregating
posts made by various bloggers about a particular topic. It addressed the problem
that while a proliferation of blogs gives voice to many, it distributes the
conversation such that it becomes next to impossible to follow the idea as expressed
across these many blogs.
The approach taken was to suggest that someone might start a dedicated TrackBack
blog on a particular topic. This special blog would not be used by the owner
of the blog to wax p'etic on topics of his or her choice, but become a repository
dedicated to a single topic. For example, imagine a site, which collects Weblog
posts about the Civil War. Anyone interested in reading about the Civil War
could look at this site to keep updated on what other Webloggers were saying
about the Civil War, see photographs from that period in magazines, etc. This
is accomplished when those who do write on their individual blogs about the
civil war initiate a TrackBack ping to the designated collector site.
It’s pretty clear that discipline-based TrackBack blogs might turn out
to be particularly interesting. What other ways might it valuable?
· If you’re running a conference or other event, a TrackBack blog
about the conference might collect what people around the blogsphere are saying
about it. (Sometimes anonymity can be good). There are some rather, ah, unique
uses, as well.
· Post on a blog the current song playing on a different PC’s copy
of WinAMP, the MP3 player (see http://a.wholelottanothing.org/archives.blah/006625).
· Then again, there’s the implementation of TrackBack from WAP enabled
mobile phones (see http://www.virtue lvis.com/archives/71.html). It’s
not clear that this one has much in the way of pedagogical value, but it’s
· A collection of your posts made on other blogs—the idea here is
to have a blog that is a collection of all the postings you’ve made on
other people’s blogs around the net (see http://unraveled.com/archives/2003/06/about_posted_elsewhere).
· Active updating of postings from a news database: memingo. This is a
bit complicated, but it's an interesting idea. This site can be set up to read
postings you've made to your blog. If it's not already in the database kept
at memingo, it is added to it. If it is already there, and your blog has TrackBack
enabled with auto-discovery, memingo can send a ping back to your blog with
a pointer that g'es to the metadata about the article (see www.memigo.com/).
The possibilities for TrackBack are only starting to be tapped. What’s
clear is simple tools can make a large difference in crossing the barrier between
splendid isolation and true conversation on the Web.
In an analysis of Usenet News only a small percentage of the users of Usenet
actually post content into it. The rest simply take advantage, and yet by most
measures, Usenet is very popular. The key is to achieve a threshold of perceived
activity that makes the reader sense the site is worthwhile.
Tools like TrackBack extend the blogs by providing markers between sites that
can facilitate the creation of community. Retaining community in the electronic
fog is a pretty good goal.
Movable Type TrackBack for Beginners
What is TrackBack?
* Case Western Reserve University opened 1,230 wireless access points, providing
free Internet access to faculty, students, staff and visitors. It is part of
a OneCleveland plan to blanket the city with free wireless Internet access.
* A Chinese government-owned bookstore chain placed a order with a Canadian
textbook publisher for a million dollars' worth of IT textbooks.
* RateMyProfessors.com posted its one-millionth college professor rating.
* A federal jury found Microsoft guilty of improperly using technology owned
by the University of California in its Internet Explorer browser.
* AIU Online, a for-profit university, is offering secure electronic signature
capabilities on all legal documents required for students.
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