LBSC670_Class_10_cv_111311x - Erik Mitchell

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22 Οκτ 2013 (πριν από 3 χρόνια και 8 μήνες)

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LBSC 670

Information Organization


Today


Case Study in Taxonomies


MESH



Explore ontology creation



Get started with Protégé





Class feedback


“I want to know more about
classification, taxonomies,
etc

. . .”



“What ILS does
HathiTrust

Use?,
What is a ‘next
-
gen’ catalog?”



“How much about classification do I
need to know?”

INLS 520


Fall 2007

Erik Mitchell

Amazon
Xray


http://www.youtube.com/watch?v=
Ab
zOLua2baw


On the
fly indexing


Knowledge Organization



tools that present the
organized
interpretation

of knowledge structures


(
Hjørland
)




classification schemes

that organize
materials at a general level…,
subject
headings

that provide more detailed
access, and
authority files
that control
variant versions of key information


(
Hodge
)


A good CV. . .


Removes ambiguity



Defines relationships
between things



Contextualizes
information

Case study
-

MeSH


http://
www.nlm.nih.gov
/
bsd
/
disted
/vid
eo/

When is a CV an Ontology?



The study of being or existence




A conceptualization of a specification


(
Gruber
)



An ontology formally defines a common
set of terms that are used to describe
and represent a domain.


(OWL
)


Computational application of “Necessary
and Sufficient” definitions

OWL? Web Ontology
Language


W3c
: “
semantic markup
language for
publishing
. . .
ontologies

on the www”


A built
-
in language:


Class


subClassOf


disjointWith


Encoded in RDF or XML

OWL schema

Range
:
hasSpiciness
,
hasTopping
,
hasBase

Relationships
,
Equivalent,
Superclass

Class / Sub
-
class
:
Pizza >>
CheesyPizza

Instances
: A
Dominoes Cheese
Pizza

Subject
Domain

INLS 520


Fall 2007

Erik Mitchell

OWL in
Protege


Classes


Sets that contain individuals


Taxonomic,
superclass
/subclass


Individuals


Examples of a defined concept


Properties


Binary relationship (
hasBase,hasTopping
)
between individuals


Similar to Slots in Protégé 3.4



DC as OWL


Classes: DC Document Model


Object properties: relationships


Data properties: DC elements


Individuals: Actual DC records


Assignment 3
-

Ontologies

Group or individual


Focused on skill development


Complete tutorial: Ch 1
-
6 (P1
-
88)


Reflective statement


Migration of LCSH
into OWL form