Requirements Statement for the Name Authority File Service.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Format:	Recurso educativo Open Access
Language:	en
Published:	1981
Subjects:	Cataloging Information Networks Information Systems Library Networks Library Standards National Programs Online Systems Program Proposals Quality Control Systems Development
Online Access:	Acceder al recurso
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_version_	1867181279726796800
collection	Education Resources Information Center
contents	Requirements Statement for the Name Authority File Service. Cataloging Information Networks Information Systems Library Networks Library Standards National Programs Online Systems Program Proposals Quality Control Systems Development This publication specifies a set of general and technical requirements that must be met by the proposed Name Authority File Service in order to create an integrated, consistent name authority file for a nationwide library and information services network. Contributions from selected institutions operating online to a single computer-based system will provide the input to the file, which will be made available to the nation's libraries in a variety of formats. Chapters identify the purpose of the system, its functions, its administration and maintenance, its user-oriented system outputs (printed, computer-output microform, and machine-readable), and its user-oriented system inputs. The initial loading of data, interfaces with other systems, and system design constraints are described. Appendices provide a display of the LC/MARC communications format specified for use in the Name Authority File Service and the proposals for file quality control. (FM)
format	Recurso educativo Open Access
id	eric_ED205180
institution	ERIC Institute of Education Sciences
language	en
publishDate	1981
record_format	eric
spellingShingle	Requirements Statement for the Name Authority File Service. Cataloging Information Networks Information Systems Library Networks Library Standards National Programs Online Systems Program Proposals Quality Control Systems Development Requirements Statement for the Name Authority File Service. Cataloging Information Networks Information Systems Library Networks Library Standards National Programs Online Systems Program Proposals Quality Control Systems Development This publication specifies a set of general and technical requirements that must be met by the proposed Name Authority File Service in order to create an integrated, consistent name authority file for a nationwide library and information services network. Contributions from selected institutions operating online to a single computer-based system will provide the input to the file, which will be made available to the nation's libraries in a variety of formats. Chapters identify the purpose of the system, its functions, its administration and maintenance, its user-oriented system outputs (printed, computer-output microform, and machine-readable), and its user-oriented system inputs. The initial loading of data, interfaces with other systems, and system design constraints are described. Appendices provide a display of the LC/MARC communications format specified for use in the Name Authority File Service and the proposals for file quality control. (FM)
title	Requirements Statement for the Name Authority File Service.
topic	Cataloging Information Networks Information Systems Library Networks Library Standards National Programs Online Systems Program Proposals Quality Control Systems Development
url	https://eric.ed.gov/?id=ED205180

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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