Thesaurus-Based Automatic Indexing: A Study of Indexing Failure.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Caplan, Priscilla Louise
Format:	Recurso educativo Open Access
Language:	en
Published:	1978
Subjects:	Automatic Indexing Coordinate Indexes Failure Information Retrieval Systems Analysis Thesauri
Online Access:	Acceder al recurso
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PRECIS: The Preserved Context Index System
by: Austin, Derek, et al.
Published: (1977)

Thesaurus Construction: An Introduction
by: Rogers, Virginia G.
Published: (1972)

Automatic Classification: Directions of Recent Research
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Microcomputers in Index Language Design and Development.
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Arabic Literature: Uniterm Indexing System for Storage and Retrieval.
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WANTED: Fully Automated Indexing.
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Intermediate Lexicon for Information Science. A Feasibility Study. Final Report.
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Thesauri for Vocabulary Control
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The Use of Automatic Indexing for Authority Control.
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Published: (1981)

Thesauri in Educational Documentation; Differences in Use Between Thesauri and Classification Schemes.
by: de Regt, W. F.
Published: (1974)

Thesauri and Classifications in Non-Scientific Areas
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Knowledge-Based Indexing of the Medical Literature: The Indexing Aid Project.
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Indexing Consistency: The Input/Output Function of Thesauri.
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Year's Work in Subject Analysis: 1981.
by: Younger, Jennifer A.
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Computerized Visual Indexes: A Review
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Multiple Thesauri in Online Library Bibliographic Systems.
by: Mandel, Carol A.
Published: (1987)

Subject Retrieval in the Seventies; New Directions. Proceedings of an International Symposium Held at the Center of Adult Education, University of Maryland, College Park, May 14 to 15, 1971.
by: Wellisch, Hans, Ed., et al.
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An Automatic Document Indexing System Based on Cooperating Expert Systems: Design and Development.
by: Schuegraf, Ernst J., et al.
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Concept-Based Retrieval of Hypermedia Information: From Term Indexing to Semantic Hyperindexing.
by: Arents, Hans C., et al.
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Citation Indexing History and Applications
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The Impact of Term-Indexing Characteristics on a Document Space.
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Year's Work in Subject Analysis: 1980.
by: Wellisch, Hans H.
Published: (1981)

Automatic Indexing in the Science and Social Science Citation Index CD-ROM.
by: Cawkell, A. E.
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A Manual on the Construction of an Indexing Language Using Educational Technology as an Example.
by: Croghan, Antony
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Evaluation of Indexing, 5. Discussion and Summary
by: Bloomfield, Masse
Published: (1971)

File Maintenance of MeSH Headings in MEDLINE.
by: Humphrey, Susanne M.
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Evaluation of Machine-Aided Indexing
by: Klingbiel, Paul H., et al.
Published: (1976)

Classification for a General Index Language.
by: Foskett, D. J.
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Modern Subject Access in the Online Age.
by: Cochrane, Pauline A.
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The Use of an On-Line Searched and Printed Coordinate Index in Teaching.
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Published: (1971)

To Index or Not To Index.
by: Veenema, Fred
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Terminological Problems: Occurrence, Causes, Consequences and Solutions in Guidance, Counselling and Associated Fields.
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Modern Subject Access in the Online Age.
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Modern Subject Access in the Online Age.
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Postcoordinate Retrieval: A Comparison of Two Indexing Languages.
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Establishing a Manual Retrieval System for a Small Library
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if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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