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evaluation of the XMPMM:history property => Action 44

From: Frank Nack <nack@uva.nl>
Date: Sun, 21 Dec 2008 14:05:20 +0100
Message-ID: <494E3F10.2070302@uva.nl>
To: Felix Sasaki <fsasaki@w3.org>
CC: "public-media-annotation@w3.org" <public-media-annotation@w3.org>

Dear all,

please find below the analysis regarding the XMPMM:'history' property. I
addressed the use-cases mentioned in the 'use case and requirements
document' :
http://dev.w3.org/2008/video/mediaann/mediaont-req/mediaont-req.html

A reminder: this is what this property is all about:
an ordered array of high level user actions that resulted in this resource

Overall, it seems to me that it would be good to adapt the history
property but it might be interesting to extend the array by not only
keeping the traces collected while generating the item but also those
that were collected while using the media document (here one could think
of splittings for a single user, a group or the public). Just a suggestion.

Best

frank

----- evaluation ------

5.2 Audiovisual archive as a Cultural Heritage Institution
This is in general a relevant for this property. As particular searches
are suggested the 'history' property can provide additional context
information that relate the search to the 'intention' of the document
when it was created. Also, as the user scenario suggests that a new
document that is currently build needs to be annotated, with a history
property parts of that can be achieved automatically (e.g. by analyzing
and selecting appropriate actions form an action log).
result: the history property is useful.

5.3 Recommendation across different media types
The description of the use case states: .... To achieve better user
experience, user history based recommendation is very promising.
This is an example where the history property could be used to not only
collect information while generating the media document but rather
collecting information of its use. The statistics collected can then be
interpreted by the application that searched for the information.
Important here is to define which type of structures are required =>
e.g. access time, access duration, access interaction)
result: potentially useful

5.4 Life Log
This example use case expands the history aspect and distributes it over
the documents themselves. Based on this use case it can be seen that
some of the information that the current XMPMM:history property
describes a particular but relevant aspect of its history. This use case
would be a good place to study which type of historic data needs to be
captured for determining its proper use in changing contexts and which
of theses aspects should be covered in the history property.
Result: usefull

5.5 Access via web client to metadata in heterogeneous formats
Having a history property an additional query could be:
'Find me all videos which followed the same development steps then the
one I am currently working on". The aim of such a query would be to find
solutions for problems faced in particular working steps within a process.
Result: potentially useful.

5.6 User generated Metadata
The history property would be metadata users generate automatically
while working on a document (perhaps without knowing, such as those
currently collected by cameras). The problem is to think about stepes
one normally would not think of to log, e.e. deleting elements (though
important as those describe the intelectual context of the document
development - the interpretation of a media document is always based on
the potential choices we do not see but can imagine - this is one basis
on how humans evaluate the value of a media document). Here it really
depends on the application.
result: potentially useful.

-- 
Dr. Frank Nack					
Human-Computer Studies Group (HCS)
Institute for Informatics
University of Amsterdam	
Kruislaan 403
1098 SJ Amsterdam 
The Netherlands
Tel:   +31 (0)20 525 6377
Fax:   +31 (0)20 525 6896
Mobil: +31 (0)6 1810 8902
Url: http://fnack.wordpress.com/


 
Received on Sunday, 21 December 2008 13:05:56 GMT

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