Early Learnings from the National Library of New Zealand's National Digital Heritage Archive Project

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Knight, Steve
Format:	Recurso educativo Open Access
Language:	en
Published:	2010
Subjects:	Foreign Countries Preservation Archives Electronic Libraries Government Libraries Organizational Change Program Development Program Implementation
Online Access:	Acceder al recurso
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author	Knight, Steve
author_facet	Knight, Steve Knight, Steve
collection	Education Resources Information Center
contents	Early Learnings from the National Library of New Zealand's National Digital Heritage Archive Project Knight, Steve Foreign Countries Preservation Archives Electronic Libraries Government Libraries Organizational Change Program Development Program Implementation Purpose: The purpose of this paper is to provide a brief description of the digital preservation programme at the National Library of New Zealand. Design/methodology/approach: Following a description of the legislative and strategic context for digital preservation in New Zealand, details are provided of the system for the National Digital Heritage Archive (NDHA), developed with help from Ex Libris, and marketed as Rosetta. A small survey of staff attitudes to the NDHA was also carried out. Findings: Key factors to be considered by others developing a digital preservation programme include: definition of strategic drivers; choice of a suitable business model; defining the exact purpose of the digital preservation programme; deployment and implementation; staffing aspects; and how to get started. Originality/value: The National Library of New Zealand has been a leading organisation in digital preservation and its experiences will be of relevance to many other libraries throughout the world. (Contains 1 figure and 1 table.)
format	Recurso educativo Open Access
id	eric_EJ923089
institution	ERIC Institute of Education Sciences
language	en
publishDate	2010
record_format	eric
spellingShingle	Early Learnings from the National Library of New Zealand's National Digital Heritage Archive Project Knight, Steve Foreign Countries Preservation Archives Electronic Libraries Government Libraries Organizational Change Program Development Program Implementation Early Learnings from the National Library of New Zealand's National Digital Heritage Archive Project Knight, Steve Foreign Countries Preservation Archives Electronic Libraries Government Libraries Organizational Change Program Development Program Implementation Purpose: The purpose of this paper is to provide a brief description of the digital preservation programme at the National Library of New Zealand. Design/methodology/approach: Following a description of the legislative and strategic context for digital preservation in New Zealand, details are provided of the system for the National Digital Heritage Archive (NDHA), developed with help from Ex Libris, and marketed as Rosetta. A small survey of staff attitudes to the NDHA was also carried out. Findings: Key factors to be considered by others developing a digital preservation programme include: definition of strategic drivers; choice of a suitable business model; defining the exact purpose of the digital preservation programme; deployment and implementation; staffing aspects; and how to get started. Originality/value: The National Library of New Zealand has been a leading organisation in digital preservation and its experiences will be of relevance to many other libraries throughout the world. (Contains 1 figure and 1 table.)
title	Early Learnings from the National Library of New Zealand's National Digital Heritage Archive Project
topic	Foreign Countries Preservation Archives Electronic Libraries Government Libraries Organizational Change Program Development Program Implementation
url	https://eric.ed.gov/?id=EJ923089

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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