gayle
Uploaded by
26 SLIDES
407 VIEWS
260LIKES

Exploring Content Management Systems and Federated Search Protocols in Digital Environments

DESCRIPTION

This document provides an overview of Content Management Systems (CMS) and Learning Management Systems (LMS), highlighting their functionalities and examples such as Wikipedia and Moodle. It discusses the significance of user-friendly interfaces, modular design, and standards compliance, particularly in educational contexts. Furthermore, the text delves into federated authentication using Shibboleth and SAML for enhanced security and user privacy. It also explores federated search protocols like SDLIP and Z39.50, detailing their importance in remote information searching.

1 / 26

Download Presentation

Exploring Content Management Systems and Federated Search Protocols in Digital Environments

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dynamic Content and Protocol-Level Interoperability hussein suleman uct cs honours 2007

  2. What are CMSes? • CMS= Content Management System • Online systems to create, store, edit, secure, preserve, transform and publish original and acquired digital content. • Examples: • Slashdot • Freshmeat • SourceForge • Wikipedia

  3. Zope.org

  4. PHPNuke, PostNuke, Zope • Manage basic content (pages) and gather resources from different locations. • Easy to use and install for end users. • Professional appearance. • Minimal installation resources. • Modular and extensible. • Portal approach to user interface.

  5. Wikipedia

  6. Wiki • Wikis are collaborative website editors, using a Web interface. • Every page (generally) has an “edit” button. • HTML is too complex so it is simplified • e.g., !! heading, *bullets, _bold_ • New pages are created by linking to them. • Security is not necessary - actions can be undone by an administrator.

  7. Blogger.com

  8. Weblogs • Online Web-based journals. • There are also online photo albums, shopping lists, CD inventories, etc. • Simple interface for non-techie users to publish thoughts. • Single or group. • Usually free - what are the economics?

  9. Moodle

  10. Learning Management Systems • Learning Management Systems (LMSes) handle not just creation and dissemination of content, but provide learning-specific facilities as well. • e.g., assignment submission, online testing • LMSes are a superset of CMSes. • Learning is not just about content! • LMSes follow Web standards as well as particular learning-related standards: • IMS Metadata Set, Content packaging, Question and Test Interoperability • SCORM Content Packaging/Delivery

  11. Ananzi

  12. Web CMS/Portal Interoperability • Federated Authentication • Federated Search • Content Syndication

  13. Federated Authentication • Shibboleth is a networked authentication/authorisation model. • Single sign-on model. • Access without identity! • Only by attributes e.g., student at UCT. • Privacy is user-controlled – users can decide how much information to pass on to third parties. • Trust relationships are established among collaborating systems out-of-band. • SAML records are exchanged to specify attributes (and club membership) of users. • Security Assertion Markup Language (SAML) is an XML-based security assertion language.

  14. Federated Search Protocols 1/2 • SDLIP (Simple Digital Library Interoperability Protocol) • Defines simple HTTP/CORBA-based interfaces for remote searching (esp. wrapping existing search systems) • Stateless/ful a/synchronous operation • 3 sub-interfaces • source metadata • search • result access

  15. Federated Search Protocols 2/2 • Z39.50 is the traditional remote search protocol for library systems. • ANSI/NISO/ISO standard • Comparatively complicated syntax/operation • Based on older standards (1998) • Latest standards for federated search: • SRW – Search/Retrieve for the Web • SRU – Search/Retrieve URL mechanism? • http://myserver.com/myurl/searchRetrieve?query=dc.title=cat&maximumRecords=10&recordSchema=http%3a//www.loc.gov/mods/&sortKeys=title,dc&startRecord=1 (excerpt from ZING website)

  16. SRW Request SOAPAction: "searchRetrieve" <SOAP:Envelope> <SOAP:Body> <SRW:searchRetrieveRequest xmlns:SRW="http://www.loc.gov/zing/srw/v1.0/"> <SRW:query>(dc.author exact "jones" prox///5 title >= "smith")</SRW:query> <SRW:sortKeys>/record/title,"http://www.loc.gov/zing/srw/dcschema/v1.0/",1,0,highValue /record/datafield[@tag="100"]/subfield[@code="a"],"http://www.loc.gov/marcxml/",,,"Smith"</SRW:sortKeys> <SRW:startRecord>1</SRW:startRecord> <SRW:maximumRecords>10</SRW:maximumRecords> <SRW:recordSchema>http://www.loc.gov/mods/</SRW:recordsSchema> </SRW:searchRetreiveRequest> </SOAP:Body> </SOAP:Envelope> (excerpt from ZING website)

  17. SRW Response <SOAP:Envelope> <SOAP:Body> <SRW:searchRetrieveResponse xmlns:SRW="http://www.loc.gov/zing/srw/v1.0/" xmlns:DIAG="http://www.loc.gov/zing/srw/v1.0/diagnostic/"> <SRW:numberOfRecords>2</SRW:numberOfRecords> <SRW:resultSetId>8c527d60-c3b4-4cec-a1de-1ff80a5932df</SRW:resultSetId> <SRW:resultSetIdleTime>600</SRW:resultSetIdleTime> <SRW:records> <SRW:record> <SRW:recordSchema>http://www.loc.gov/mods/</SRW:recordSchema> <SRW:recordData> &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt; &lt;mods xmlns:xlink=&quot;http://www.w3.org/TR/xlink&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot; xmlns=&quot;http://www.loc.gov/mods/&quot; xsi:schemaLocation=&quot;http://www.loc.gov/mods/ http://www.loc.gov/standards/mods/mods.xsd&quot;&gt; &lt;titleInfo&gt; &lt;title&gt;Sound and fury : the making of the punditocracy /&lt;/title&gt; &lt;/titleInfo&gt; &lt;name type=&quot;personal&quot;&gt; &lt;namePart&gt;Alterman, Eric.&lt;/namePart&gt; &lt;role&gt;creator&lt;/role&gt; &lt;/name&gt; ... </SRW:recordData> <SRW:recordPosition>1</SRW:recordPosition> </SRW:record> ... (excerpt from ZING website)

  18. Content Syndication - RSS • Really Simple Syndication (RSS) is a (predecessor to SOAP) standard to transfer a list of recently updated entries from one CMS to another. • RSS 2.0 is arguably a dynamically-generated “data format” rather than a “protocol”. • Lots of different (incompatible) versions: 0.91, 0.92, 2.0, etc. • RSS 0.92 used the Resource Description Framework (RDF) XML format to encode items. • Blogs, Wikis and other CMSes generally support RSS, sometimes both as client and server. • Alternatives? OAI-PMH?

  19. RSS Time Sequence Client Server HTTP GET /rss.xml RSS Document v1 HTTP GET /rss.xml RSS Document v2 ...

  20. RSS Example <?xml version="1.0"?> <rss version="2.0"> <channel> <title>Liftoff News</title> <link>http://liftoff.msfc.nasa.gov/</link> <description>Liftoff to Space Exploration.</description> <language>en-us</language> <pubDate>Tue, 10 Jun 2003 04:00:00 GMT</pubDate> <lastBuildDate>Tue, 10 Jun 2003 09:41:01 GMT</lastBuildDate> <docs>http://blogs.law.harvard.edu/tech/rss</docs> <generator>Weblog Editor 2.0</generator> <managingEditor>editor@example.com</managingEditor> <webMaster>webmaster@example.com</webMaster> <item> <title>Star City</title> <link>http://liftoff.msfc.nasa.gov/news/2003/news-starcity.asp</link> <description>How do Americans get ready to work …</description> <pubDate>Tue, 03 Jun 2003 09:39:21 GMT</pubDate> <guid>http://liftoff.msfc.nasa.gov/2003/06/03.html#item573</guid> </item> <item> <description>Sky watchers in Europe, Asia, and parts of Alaska and Canada will experience a &lt;a href="http://science.nasa.gov/headlines/y2003/30may_solareclipse.htm"&gt;partial eclipse</description> <pubDate>Fri, 30 May 2003 11:06:42 GMT</pubDate> <guid>http://liftoff.msfc.nasa.gov/2003/05/30.html#item572</guid> </item> </channel> </rss> source: http://www.rssboard.org/files/sample-rss-2.xml

  21. RSS Basic Structure <rss version=“2.0”> <channel> <title>some channel</title> <link>some link</link> <description>stuff…</description> <item> <title>an_item</title> … </item> … </channel>

  22. RSS Channel Tags

  23. RSS Item Tags

  24. RSS Cloud • Notification system for RSS • Why contact the server waiting for an update when the server can contact you when it updates its content? • Two methods: • clientcloud_server, registers the procedure, port and transport protocol (e.g., SOAP) to use to notify the client when content changes. • cloud_serverclient, sends the RSS URL for the changed document. • Clients must register every 24 hours.

  25. Podcasting • Podcasting refers to the distribution of multimedia (non-text) files over the Internet using RSS-like technology. • Media files are linked to RSS items using the <enclosure> tag and automatically downloaded to mobile devices. source: http://www.rssboard.org/rss-specification

  26. References • Internet2 (2006) Shibboleth Project. Website http://shibboleth.internet2.edu/ • Library of Congress (2006) SRU: Search and Retrieve via URL. Website http://www.loc.gov/standards/sru/ • RSS Advisory Board (2005) Really Simple Syndication: RSS 2.0.1 Specification (revision 6). Available http://www.rssboard.org/rss-specification • RSS Advisory Board (2001) Really Simple Syndication: RssCloud API. Available http://www.rssboard.org/rsscloud-interface • Sureau, D. G. (2006) RSS - Really Simple Syndication. Available http://www.xul.fr/en-xml-rss.html

More Related
SlideServe
Audio
Live Player
Audio Wave
Play slide audio to activate visualizer
Slide 1

Sea Ice

Slide Player

AI NARRATOR Slide 1 of 12

Sea Ice

0:00 0:15