MARC Data, the OPAC, and Library Professionals

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Williams, Jo
Format:	Recurso educativo Open Access
Language:	en
Published:	2009
Subjects:	Cataloging Metadata Library Science Librarians Online Catalogs
Online Access:	Acceder al recurso
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author	Williams, Jo
author_facet	Williams, Jo Williams, Jo
collection	Education Resources Information Center
contents	MARC Data, the OPAC, and Library Professionals Williams, Jo Cataloging Metadata Library Science Librarians Online Catalogs Purpose: The purpose of this paper is to show that knowledge of the Machine-Readable Cataloguing (MARC) format is useful in all aspects of librarianship, not just for cataloguing, and how MARC knowledge can address indexing limitations of the online catalogue. Design/methodology/approach: The paper employs examples and scenarios to show the usefulness of MARC knowledge among library professionals. Findings: The paper finds that library professionals with an understanding of MARC also have an advantage in understanding how Online Public Access Catalogues (OPACs) work. With a knowledge of MARC, librarians can understand OPAC indexing limitations and develop ways to work around those limitations. An understanding of MARC bibliographic data across library specialities allows librarians to work interdependently to affect the functionality of the OPAC. Originality/value: Editing/manipulating MARC data based on indexing limitations of the online catalogue can improve retrieval of library resources. Additionally, MARC knowledge and skills are transferable, even with the challenges of changing OPAC technology.
format	Recurso educativo Open Access
id	eric_EJ856917
institution	ERIC Institute of Education Sciences
language	en
publishDate	2009
record_format	eric
spellingShingle	MARC Data, the OPAC, and Library Professionals Williams, Jo Cataloging Metadata Library Science Librarians Online Catalogs MARC Data, the OPAC, and Library Professionals Williams, Jo Cataloging Metadata Library Science Librarians Online Catalogs Purpose: The purpose of this paper is to show that knowledge of the Machine-Readable Cataloguing (MARC) format is useful in all aspects of librarianship, not just for cataloguing, and how MARC knowledge can address indexing limitations of the online catalogue. Design/methodology/approach: The paper employs examples and scenarios to show the usefulness of MARC knowledge among library professionals. Findings: The paper finds that library professionals with an understanding of MARC also have an advantage in understanding how Online Public Access Catalogues (OPACs) work. With a knowledge of MARC, librarians can understand OPAC indexing limitations and develop ways to work around those limitations. An understanding of MARC bibliographic data across library specialities allows librarians to work interdependently to affect the functionality of the OPAC. Originality/value: Editing/manipulating MARC data based on indexing limitations of the online catalogue can improve retrieval of library resources. Additionally, MARC knowledge and skills are transferable, even with the challenges of changing OPAC technology.
title	MARC Data, the OPAC, and Library Professionals
topic	Cataloging Metadata Library Science Librarians Online Catalogs
url	https://eric.ed.gov/?id=EJ856917

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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