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AGROVOC
Purpose of indexing
=
Retrieval
‫‪DEFINITION‬‬
‫‪Indexing‬‬
‫=‬
‫عملية وصف وتعريف المصدر وفقا للمحتوى الموضوعي‬
BASIC INDEXING PRINCIPLES
OPERATION & PURPOSE
STAGE 1: determining the subject
STAGE 2: representing concepts by elements in
the indexing language
STAGE 1
A.
Understanding the document
B.
Identifying concepts
C.
Selecting concepts
STAGE 1
DETERMINATION OF THE SUBJECT
=
RECOGNITION OF THE MOST SIGNIFICANT PARTS OF A
RESOURCE

TITLE

SUMMARY

TABLE OF CONTENTS

INTRODUCTION

FIRST PARAGRAPHS

CONCLUSIONS

ILLUSTRATIONS
STAGE 1



MOST IMPORTANT !
Cannot add input at output stage
Unreasonable saving in indexing increases cost in
retrieval
IF NOT INDEXED PROPERLY A RESOURCE MAY BE
LOST FOREVER
STAGE 1
MAIN CRITERIA FOR INDEXING
Specificity
Exhaustivity
STAGE 2
REPRESENTING CONCEPTS BY
ELEMENTS IN THE INDEXING LANGUAGE
=
AGRIS
INDEXING LANGUAGE
REPRESENTATION
NATURAL LANGUAGE
SYMBOLS
(THESAURUS)
(CLASSIFICATION)
AGRIS SUBJECT CONTROL

ENRICHMENT OF TITLE

CATEGORIZATION

AGROVOC
INTRODUCTION TO
AGROVOC
CONTROLLED VOCABULARY
THESAURUS
AGROVOC
A CONTROLLED VOCABULARY
IS
A listing of terms that have been selected
To be used for:
Indexing into
Or
Retrieving from
A bibliographic database
A THESAURUS
IS
A CONTROLLED VOCABULARY
In which the semantic relationships between the chosen terms
are shown
RELATIONSHIPS
CAN BE:

PREFERENTIAL

HIERARCHICAL

ASSOCIATIVE
PREFERENTIAL RELATIONSHIP
phytopathology
USE PLANT PATHOLOGY
labor
USE LABOUR
genetics
USE HEREDITY
PLANT PATHOLOGY
UF phytopathology
LABOUR
UF labor
HEREDITY
UF genetics
USE = use a descriptor instead of a
non descriptor
UF = used for a non descriptor
HIERARCHICAL RELATIONSHIP
BRASSICA CAMPESTRIS
SPECIES
BT1 BRASSICA
GENUS
BT2 CRUCIFERAE
FAMILY
BT3 RHOEADALES
ORDER
BT4 DICOTYLEDONS
DICOTYLEDONS
CLASS
CLASS
NT1 RHOEADALES
NT2 CRUCIFERAE
NT3 BRASSICA
NT4 BRASSICA CAMPESTRIS
ORDER
FAMILY
GENUS
SPECIES
ASSOCIATIVE RELATIONSHIP

Creative relation

NECTAR
Instrumental relation
PLOUGHING
RT HONEY

RT PLOUGHS
Concurrent use relation
PEST CONTROL
TEACHING
RT PESTICIDES
RT EDUCATION
MACHINERY
RT MECHANIZATION

Cause and effect relation

Material relation
FIBRE PULP
RT FIBREBOARDS
DEFOLIANTS
RT ABSCISSION
MILK
RT MILK PRODUCTS
RELATIONSHIPS
STRUCTURE
Fungal
diseases
UF
USE
BT
DISEASES
NT
MYCOSES
NT
BT
RT
RT
FUNGI
DERMATO
MYCOSES
A THESAURUS
MAY ALSO CONTAIN
SCOPE NOTE
WORD BLOCK
TOP TERM
SCOPE NOTES
To supplement descriptors and non descriptors when it
is felt necessary to explain, define or limit a given
term.
Example:
CITRUS
(in general, it is preferable to use descriptors listed under
CITRUS FRUITS because the taxonomy of citrus species is
confused)
WORD BLOCKS
EXAMPLE
BULLOCKS
(Castrated bulls)
UF ox
UF oxen
UF steers
BT CATTLE
BT working animals
RT BULLS
Descriptor entry term
(scope note)
Non-descriptors for which
BULLOCKS should be used
Broader or more generic terms
Term related to BULLOCKS
AGROVOC
IS
A LISTING OF:


Detailed terminology of useful animals and plants
Less specific terminology of all other subject areas
within the scope of AGRIS
AGROVOC


ALPHABETICAL ORDER
WORD FORM
•
•
•
•
•
SPELLING
SUBSTANTIVE
ADJECTIVES
PLURAL FORM
ABBREVIATIONS OR ACRONYMS
TYPE OF TERM
TYPE
SPECIFIC TERM
GENERIC TERM
Material
ALANINE
AMINO ACIDS
Property, Condition,
character
SIZE
DIMENTIONS
Equipment, object,
organism
Part of the body
Class of use
APPLES
TRACTORS
BRAIN
LEGS
ADHESIVES
FERTILIZERS
TYPE OF TERM
TYPE
SPECIFIC TERM
Process
AERATION
MANAGEMENT
Proper or unique
name
CANADA
MOON
Discipline or subject
area
AGRICULTURE
CHEMISTRY
Event, occurrence
GENERIC TERM
EARTHQUACES
FOREST FIRES