AGROVOC

Purpose of indexing

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Retrieval

DEFINITION

Indexing

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وفقا المصدر وتعريف وصف عمليةالموضوعي للمحتوى

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

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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

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AGRIS

INDEXING LANGUAGE

REPRESENTATION

NATURAL LANGUAGE

(THESAURUS)

SYMBOLS

(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

phytopathologyUSE PLANT PATHOLOGY

laborUSE LABOUR

genetics USE HEREDITY

USE = use a descriptor instead of a non descriptor

PLANT PATHOLOGYUF phytopathology

LABOURUF labor

HEREDITYUF genetics

UF = used for a non descriptor

HIERARCHICAL RELATIONSHIP

BRASSICA CAMPESTRIS SPECIES

BT1 BRASSICA GENUS

BT2 CRUCIFERAE FAMILY

BT3 RHOEADALES ORDER

BT4 DICOTYLEDONS CLASS

DICOTYLEDONS CLASS

NT1 RHOEADALES ORDER

NT2 CRUCIFERAE FAMILY

NT3 BRASSICA GENUS

NT4 BRASSICA CAMPESTRIS SPECIES

ASSOCIATIVE RELATIONSHIP

Creative relation

NECTAR

RT HONEY Concurrent use relation

TEACHING

RT EDUCATION

MACHINERY

RT MECHANIZATION Cause and effect relation

DEFOLIANTS

RT ABSCISSION

Instrumental relation

PLOUGHING

RT PLOUGHS

PEST CONTROL

RT PESTICIDES

Material relation

FIBRE PULP

RT FIBREBOARDS

MILK

RT MILK PRODUCTS

RELATIONSHIPSSTRUCTURE

MYCOSES

Fungal diseases

DERMATOMYCOSES

DISEASES

FUNGI

USEUF

RTRT

NT

BT

BT

NT

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 Descriptor entry term(Castrated bulls) (scope note)

UF ox Non-descriptors for whichUF oxen BULLOCKS should be usedUF steers

BT CATTLE Broader or more generic termsBT working animals

RT BULLS Term related to BULLOCKS

AGROVOCIS

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

TYPESPECIFIC TERMGENERIC TERM

MaterialALANINEAMINO ACIDS

Property, Condition, character

SIZEDIMENTIONS

Equipment, object, organism

APPLES

TRACTORS

Part of the bodyBRAINLEGS

Class of useADHESIVES

FERTILIZERS

TYPE OF TERM

TYPESPECIFIC TERMGENERIC TERM

ProcessAERATION

MANAGEMENT

Proper or unique nameCANADA

MOON

Discipline or subject area

AGRICULTURE

CHEMISTRY

Event, occurrenceEARTHQUACES

FOREST FIRES