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 A. Understanding the document B. Identifying concepts C. 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 CAMPESTRISSPECIES BT1 BRASSICAGENUS BT2 CRUCIFERAEFAMILY BT3 RHOEADALESORDER BT4 DICOTYLEDONSCLASS DICOTYLEDONSCLASS NT1 RHOEADALES ORDER NT2 CRUCIFERAE FAMILY NT3 BRASSICAGENUS NT4 BRASSICA CAMPESTRISSPECIES

18. 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

19. RELATIONSHIPS STRUCTURE MYCOSES Fungal diseases DERMATO MYCOSES DISEASES FUNGI USEUF RT NT BT NT

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 BULLOCKSDescriptor entry term (Castrated bulls)(scope note) UF oxNon-descriptors for which UF oxenBULLOCKS should be used UF steers BT CATTLEBroader or more generic terms BT working animals RT BULLSTerm related to BULLOCKS

23. 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

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

25. TYPE OF TERM GENERIC TERMSPECIFIC TERM TYPE AMINO ACIDSALANINEMaterial DIMENTIONSSIZE Property, Condition, character APPLES TRACTORS Equipment, object, organism LEGSBRAINPart of the body ADHESIVES FERTILIZERS Class of use

26. TYPE OF TERM GENERIC TERMSPECIFIC TERM TYPE AERATION MANAGEMENT Process CANADA MOON Proper or unique name AGRICULTURE CHEMISTRY Discipline or subject area EARTHQUACES FOREST FIRES Event, occurrence