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Bibliographic Details
Main Author:	Brand, Stewart
Format:	Recurso educativo Open Access
Language:	en
Published:	1999
Subjects:	Information Storage Internet Long Range Planning Metadata Obsolescence Preservation Standards Technological Advancement
Online Access:	https://eric.ed.gov/?id=EJ584182
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A Review of the Preservation Issues Associated with Digital Documents.
by: Parkes, Mitchell
Published: (1999)

Avoiding Technological Quicksand: Finding a Viable Technical Foundation for Digital Preservation. A Report to the Council on Library and Information Resources.
by: Rothenberg, Jeff
Published: (1999)

The Great "Reading vs. Technology Debate" (Part I).
by: Barron, Daniel D.
Published: (1998)

The Next Stage: Moving from Isolated Digital Collections to Interoperable Digital Libraries.
by: Besser, Howard
Published: (2002)

Problems in the Preservation of Electronic Records.
by: Lin, Lim Siew, et al.
Published: (2003)

Libraries and Technology.
Published: (1988)

Digital Libraries: The Grand Challenges.
by: Tennant, Roy
Published: (1997)

Developing a Standard Vision.
by: Michael, James
Published: (1993)

Digital Archiving and Preservation: Technologies and Processes for a Trusted Repository
by: Jantz, Ronald, et al.
Published: (2006)

Building the Virtual Scriptorium
by: Nikolova-Houston, Tatiana, et al.
Published: (2008)

The Transformation from Microfilm to Digital Storage and Access.
by: Bellinger, Meg
Published: (1998)

Videodisc Technology: Developments 1980-1982.
by: Riddick, John
Published: (1983)

What Size Libraries for 2010?
by: Matier, Michael, et al.
Published: (1993)

Encoded Archival Description as a Halfway Technology
by: Dow, Elizabeth H.
Published: (2009)

CD-ROM and Libraries.
by: Murphy, Brower
Published: (1985)

Digital Imaging of Papyri. A Report to the Commission on Preservation and Access.
by: Bagnall, Roger S.
Published: (1995)

Libraries, Technology, and the Information Marketplace.
by: De Gennaro, Richard
Published: (1982)

Archival Administration in the Electronic Information Age: An Advanced Institute for Government Archivists (Pittsburgh, Pennsylvania, June 3-15, 1990).
Published: (1990)

Archival Administration in the Electronic Information Age: An Advanced Institute for Government Archivists (2nd, Pittsburgh, Pennsylvania, June 3-14, 1991).
Published: (1991)

Academic Libraries in Ohio. Progress through Collaboration, Storage, and Technology. Report of the Library Study Committee.
Published: (1987)

Tomorrow's Library Today.
by: Penniman, W. David
Published: (1987)

Building a National Strategy for Digital Preservation: Issues in Digital Media Archiving.
Published: (2002)

Using the Delphi Technique for Planning the Future of Libraries
by: Wennerberg, Ulf
Published: (1972)

Preservation Methods for Digital Library
by: Rajendran, L., et al.
Published: (2005)

Serials on Optical Disks: A Library of Congress Pilot Program.
by: Criswell, Lela Beth
Published: (1983)

A Brief Look at Recent Developments in the Preservation and Conservation of Special Collections.
by: Hain, Jennifer E.
Published: (2003)

Information Technology: A Survey from the Perspective of Higher Education.
by: Van Houweling, Douglas E.
Published: (1986)

Multiple Versions Forum Report. Report from a Meeting (Airlie House, Warrenton, Virginia, December 6-8, 1989).
Published: (1990)

Interim Study Committee on Library Issues: Final Report.
Published: (1994)

Preservation in the Digital World.
by: Conway, Paul
Published: (1996)

DVD: The Next Big (Digital) Thing?
by: Dick, Jeff T.
Published: (1999)

Trends in the Evolution of the Public Web, 1998-2002; The Fedora Project: An Open-source Digital Object Repository Management System; State of the Dublin Core Metadata Initiative, April 2003; Preservation Metadata; How Many People Search the ERIC Database Each Day?
by: O'Neill, Edward T., et al.
Published: (2003)

Incredible Past, Incredible Future.
by: Veaner, Allen B.
Published: (1982)

Preservation Film: Platform for Digital Access Systems.
by: Jones, C. Lee
Published: (1993)

Preservation Health Check: Monitoring Threats to Digital Repository Content
by: Kool, Wouter, et al.
Published: (2014)

SGML as a Framework for Digital Preservation and Access.
by: Coleman, James, et al.
Published: (1997)

Metadata and the Dublin Core: Emerging Standards for Digitization Projects.
by: Machovec, George S., Ed.
Published: (1998)

The State of Recorded Sound Preservation in the United States: A National Legacy at Risk in the Digital Age. CLIR Publication No. 148
by: Bamberger, Rob, et al.
Published: (2010)

Developing a Strategic Plan for Library Space Needs through 2010.
by: Matier, Michael W., et al.
Published: (1992)

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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Session

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PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin"
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REQUEST_SCHEME	"https"
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GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
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REQUEST_URI	"/Record/eric_EJ584182/Similar"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1784649052.1322
REQUEST_TIME	1784649052

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
language	"en"
VUFIND_SESSION	"6f365316802a61479376892cd351fca0"
ui	"standard"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1784649052.1499 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "6f365316802a61479376892cd351fca0" ]`]
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FlashMessenger	Laminas\Stdlib\ArrayObject {#1583}
SessionHelper	Laminas\Stdlib\ArrayObject {#1773}

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Key	Value
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REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"info.umar.mx"
REDIRECT_STATUS	"200"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"info.umar.mx"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
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PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.66 (Ubuntu) Server at info.umar.mx Port 443</address>\n"
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SERVER_PORT	"443"
REMOTE_ADDR	"216.73.216.85"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"admin@localhost"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"39296"
REDIRECT_URL	"/Record/eric_EJ584182/Similar"
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/eric_EJ584182/Similar"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1784649052.1322
REQUEST_TIME	1784649052

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

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