Maurice Hendrix

http://prolearn.dcs.warwick.ac.uk/AH-RO-2007/

(Semi-)automatic authoring of AH

Outline

• Why automatic authoring• System overview• Semantic Desktop• Adding resources

Why automatic authoring

• Make authoring task easier

• Manual annotation is bottleneck

• By integrating authoring environment into semantic desktop

System overview

SesameDatabase Lucene

CAFCAF

MOT

Enricher

Beagle++

RDF

Concept maps and lessons are hierarchies:

MOT hierarchy structure

Adaptive Hypermedia

Hypermedia

From AH to Adaptive Web

AH

Semantic Desktop• Desktop where everything is stored with

extra metadata• We uses RDF as storage format• Example RDF (also has an XML representation):

Publication

Conference

published At

Adding Resources

• MOT goal/domain maps are hierarchies with tree structure, siblings are concepts at the same level

• The Semantic Desktop can be searched for resources. They are ranked by 2 formulae

Ranking

• Concept oriented

• Article Oriented

where: rank(a,c) is the rank of article a with respect to the current domain concept c;k(c) is the set of keywords belonging to the current domain concept c;k(a) is the set of keywords belonging to the current article a; |S| = the cardinality of the set S, for a given set S.

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k(c)

k(a)k(c)=c)rank(a,

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k(a)

k(a)k(c)=c)rank(a,

Selection of ranking method - snapshot

Equal ranks

Allow duplicates among siblings• We call concepts in MOT at the same

depth in the hierarchy Siblings• The author has to make a choice.• Adding to all siblings can mean students

get the link multiple times• Choosing one of the siblings can mean

students don’t always get the link when relevant.

Selection of duplicates/none snapshot

Add meta-data as separate concepts• The retrieved resources might have

attributes themselves• If resources have further attributes,

these can be added as domain attributes in MOT

• The resource can also be made into a domain concept with its own separate domain attributes

Add metadata as attributes

Add metadata as Separate concepts

Separate concepts/ attributes snapshot

Compute resource keywords as set• The number of times a keyword occurs

might indicate the relevance of the keyword.

• The ranking formulae can be computed on sets of keywords or multisets.

Set/ multiset snapshot

Before MOT hierarchy snapshot

After MOT hierarchy snapshot

Questions?