Transcript AGROVOC
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