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- Taxonomy provides:
- Framework for content organization
- Hierarchical outline of your content by subject categories
- Basis for effective browsing
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- Browsable categories of a directory
- Smart search for term equivalents
- Taxonomy terms (original or modified) as labels
- Navigation aids incorporate taxonomy terms and relationships
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- Complete database (60,000 + titles)
- Free text search
- Free text search on titles
- Search by taxonomy descriptor (AKA subject term or category)
- 470 hits
- 100% relevant
- 100% recall
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- Items in an information collection can be retrieved with better
precision (relevance) and better recall by using a controlled vocabulary
to assign subject terms (key words) to them
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- Use the rulebase you’ve developed for machine aided indexing (MAIQuery)
- Use the controlled vocabulary itself
(TM Navtree)
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- MAI (Machine Aided Indexer)
- helps authors and editors assign effective subject terms
- automates the assignment of subject terms to items in legacy
collections
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- M.A.I. suggests the correct terms from the taxonomy as descriptors
- M.A.I. rulebase recognizes term equivalents
- germs à Microorganisms
- vaccin* à Pharmaceutical
drugs
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- MAI can also:
- Provide for the appropriate preferred term when given a word or phrase
- Return preferred terms for uses of the word in different contexts
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- MAIQuery can:
- Show related terms from the thesaurus to broaden a search
- Show the rules and preferred term’s scope notes to clarify how the preferred
term relates to others in the thesaurus
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- Web page presents a search box that will use the MAI rulebase
- Can be in addition to full text search and advanced search
- User enters a word or phrase in the search box
- MAI searches the rulebase for any occurrences of the word(s)
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- Uses web pages and php coding:
- Passes the search words to “dosearch.php”
- dosearch.php passes the term to MAI’s concept extractor
- MAI returns a list of suggested terms from the controlled vocabulary
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- Present your controlled vocabulary as a guide to your collection
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- Australian Governments' Interactive Functions Thesaurus – AGIFT
http://www.naa.gov.au/recordkeeping/thesaurus/000482.htm
- Transportation Research Thesaurus – TRT http://ntl.bts.gov/trt/trt_topterms.jsp
- NBII (National Biological Information Infrastructure)
http://thesaurus.nbii.gov/SearchNBIIThesaurus/about.faces
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- Your thesaurus presented as a navigation aid
- User “drill down” with all the neighboring terms visible
- Each term indicates the number of documents indexed with it
- Terms are hyperlinks to a list of items
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- Click on a term, get the titles indexed with it
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- Click on a title, get its details (or bring up the item)
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- We used PHP Levels, an open source application from SourceForge to
create the tree
- An exported XML version of the thesaurus is parsed to produce the
required text file to populate the tree
- The content manager is queried for the document totals
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- When a term is selected, it is passed to a gettitles.php
- A bit of php code connects to the content manager and returns a string
of data about each title
- The web page displays the data in the format desired
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- TM Navtree Top Terms describe the organization of your collection(s)
- Narrower terms help your user hone in on the most appropriate term
- Adjacent terms impart connotation
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- ALL the records indexed with the chosen term are returned
- Your user finds what’s needed more quickly and is more productive
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