Access: A Study of Information Storage and Retrieval with Emphasis on Library Information Systems. Interim Report.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Authors:	Resnikoff, H. L., Dolby, J. L.
Format:	Recurso educativo Open Access
Language:	en
Published:	1971
Subjects:	Archives Books Indexes Information Retrieval Information Storage Information Systems Library Collections Library Materials
Online Access:	Acceder al recurso
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author	Resnikoff, H. L. Dolby, J. L.
author_facet	Resnikoff, H. L. Dolby, J. L. Resnikoff, H. L. Dolby, J. L.
collection	Education Resources Information Center
contents	Access: A Study of Information Storage and Retrieval with Emphasis on Library Information Systems. Interim Report. Resnikoff, H. L. Dolby, J. L. Archives Books Indexes Information Retrieval Information Storage Information Systems Library Collections Library Materials Chapter I: "Introduction and Summary of Results," stresses the view that the problem of insufficient access is primarily a problem of the great size of the archives to which access is desired. Chapter II: "Levels of Information Storage and Access," is directed toward the problems of library archives and in this context it is access to the content of books and collections of books that is of immediate concern. Chapter III: "Mathematics of Information Distributions," is devoted to the mathematical study of some of the distributions that arise naturally in the study of information systems. Chapter IV: "The Structure of the Back-of-the Book Indexes," is a study of indexes to books in order to determine what structure, if any, they possess. Chapter V: "Algorithmetic Text Indexing," is also exclusively concerned with back-of-the book indexes. Chapter VI: "Amalgamative Access Mechanisms," looks at the problem of discovering possible methods for accessing books. Examples of indexes are appended and the tables included are listed. (NH)
format	Recurso educativo Open Access
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institution	ERIC Institute of Education Sciences
language	en
publishDate	1971
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spellingShingle	Access: A Study of Information Storage and Retrieval with Emphasis on Library Information Systems. Interim Report. Resnikoff, H. L. Dolby, J. L. Archives Books Indexes Information Retrieval Information Storage Information Systems Library Collections Library Materials Access: A Study of Information Storage and Retrieval with Emphasis on Library Information Systems. Interim Report. Resnikoff, H. L. Dolby, J. L. Archives Books Indexes Information Retrieval Information Storage Information Systems Library Collections Library Materials Chapter I: "Introduction and Summary of Results," stresses the view that the problem of insufficient access is primarily a problem of the great size of the archives to which access is desired. Chapter II: "Levels of Information Storage and Access," is directed toward the problems of library archives and in this context it is access to the content of books and collections of books that is of immediate concern. Chapter III: "Mathematics of Information Distributions," is devoted to the mathematical study of some of the distributions that arise naturally in the study of information systems. Chapter IV: "The Structure of the Back-of-the Book Indexes," is a study of indexes to books in order to determine what structure, if any, they possess. Chapter V: "Algorithmetic Text Indexing," is also exclusively concerned with back-of-the book indexes. Chapter VI: "Amalgamative Access Mechanisms," looks at the problem of discovering possible methods for accessing books. Examples of indexes are appended and the tables included are listed. (NH)
title	Access: A Study of Information Storage and Retrieval with Emphasis on Library Information Systems. Interim Report.
topic	Archives Books Indexes Information Retrieval Information Storage Information Systems Library Collections Library Materials
url	https://eric.ed.gov/?id=ED050773

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// 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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