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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.

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AGROVOC

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  1. AGROVOC

  2. Purpose of indexing = Retrieval

  3. DEFINITION Indexing = عملية وصف وتعريف المصدر وفقا للمحتوى الموضوعي

  4. BASIC INDEXING PRINCIPLES OPERATION & PURPOSE STAGE 1: determining the subject STAGE 2: representing concepts by elements in the indexing language

  5. STAGE 1 • Understanding the document • Identifying concepts • Selecting concepts

  6. 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

  7. 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

  8. STAGE 1 MAIN CRITERIA FOR INDEXING • Specificity • Exhaustivity

  9. STAGE 2 REPRESENTING CONCEPTS BY ELEMENTS IN THE INDEXING LANGUAGE = AGRIS INDEXING LANGUAGE

  10. REPRESENTATION NATURAL LANGUAGE (THESAURUS) SYMBOLS (CLASSIFICATION)

  11. AGRIS SUBJECT CONTROL • ENRICHMENT OF TITLE • CATEGORIZATION • AGROVOC

  12. INTRODUCTION TO AGROVOC CONTROLLED VOCABULARY THESAURUS AGROVOC

  13. A CONTROLLED VOCABULARY IS A listing of terms that have been selected To be used for: Indexing into Or Retrieving from A bibliographic database

  14. A THESAURUS IS A CONTROLLED VOCABULARY In which the semantic relationships between the chosen terms are shown

  15. RELATIONSHIPS CAN BE: • PREFERENTIAL • HIERARCHICAL • ASSOCIATIVE

  16. PREFERENTIAL RELATIONSHIP phytopathology USE PLANT PATHOLOGY labor USE LABOUR genetics USE HEREDITY USE = use a descriptor instead of a non descriptor PLANT PATHOLOGY UF phytopathology LABOUR UF labor HEREDITY UF genetics UF = used for a non descriptor

  17. 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

  18. ASSOCIATIVE RELATIONSHIP • Creative relation NECTAR RT HONEY • Concurrent use relation TEACHING RT EDUCATION MACHINERY RT MECHANIZATION • Cause and effect relation DEFOLIANTS RT ABSCISSION • Instrumentalrelation PLOUGHING RT PLOUGHS PEST CONTROL RT PESTICIDES • Material relation FIBRE PULP RT FIBREBOARDS MILK RT MILK PRODUCTS

  19. RELATIONSHIPSSTRUCTURE Fungal diseases UF USE BT NT DISEASES DERMATO MYCOSES MYCOSES NT BT RT RT FUNGI

  20. A THESAURUS MAY ALSO CONTAIN SCOPE NOTE WORD BLOCK TOP TERM

  21. 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)

  22. WORD BLOCKS EXAMPLE BULLOCKS Descriptor entry term (Castrated bulls) (scope note) UF ox Non-descriptors for which UF oxen BULLOCKS should be used UF steers BT CATTLE Broader or more generic terms BT working animals RT BULLS Term related to BULLOCKS

  23. AGROVOCIS A LISTING OF: • Detailed terminology of useful animals and plants • Less specific terminology of all other subject areas within the scope of AGRIS

  24. AGROVOC • ALPHABETICAL ORDER • WORD FORM • SPELLING • SUBSTANTIVE • ADJECTIVES • PLURAL FORM • ABBREVIATIONS OR ACRONYMS

  25. TYPE OF TERM

  26. TYPE OF TERM

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