TRIAL: Producing Media Catalogs.

Fuente: ERIC Institute of Education Sciences

Guardado en:

Detalles Bibliográficos
Autor principal:	McWeeney, Mark G.
Formato:	Recurso educativo Open Access
Lenguaje:	en
Publicado:	1974
Materias:	Catalogs Guides Information Retrieval Library Automation Media Specialists Online Systems
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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author	McWeeney, Mark G.
author_facet	McWeeney, Mark G. McWeeney, Mark G.
collection	Education Resources Information Center
contents	TRIAL: Producing Media Catalogs. McWeeney, Mark G. Catalogs Guides Information Retrieval Library Automation Media Specialists Online Systems TRIAL (Technique for Retrieving Information from Abstracts of Literature) is an information storage and retrieval system which can be used by school media specialists to produce indexes of non-print materials. This manual provides a step by step approach for media specialists to automate their non-print holdings. These procedures can also be applied to all materials which require bibliographic control or file efficiency. Instructions are provided for building TRIAL on nine levels of information, how to create a permanent file, how to retrieve an index on each and every level, and how to search the data base. Although only batch processing is explained in this manual, TRIAL can also be manipulated on-line. (Author/AWP)
format	Recurso educativo Open Access
id	eric_ED152303
institution	ERIC Institute of Education Sciences
language	en
publishDate	1974
record_format	eric
spellingShingle	TRIAL: Producing Media Catalogs. McWeeney, Mark G. Catalogs Guides Information Retrieval Library Automation Media Specialists Online Systems TRIAL: Producing Media Catalogs. McWeeney, Mark G. Catalogs Guides Information Retrieval Library Automation Media Specialists Online Systems TRIAL (Technique for Retrieving Information from Abstracts of Literature) is an information storage and retrieval system which can be used by school media specialists to produce indexes of non-print materials. This manual provides a step by step approach for media specialists to automate their non-print holdings. These procedures can also be applied to all materials which require bibliographic control or file efficiency. Instructions are provided for building TRIAL on nine levels of information, how to create a permanent file, how to retrieve an index on each and every level, and how to search the data base. Although only batch processing is explained in this manual, TRIAL can also be manipulated on-line. (Author/AWP)
title	TRIAL: Producing Media Catalogs.
topic	Catalogs Guides Information Retrieval Library Automation Media Specialists Online Systems
url	https://eric.ed.gov/?id=ED152303

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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