agrovoc. purpose of indexing = retrieval definition indexing = عملية وصف وتعريف...
TRANSCRIPT
AGROVOC
Purpose of indexing
=
Retrieval
DEFINITION
Indexing
=
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
=
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
(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