1 / 21

LBSC 670

LBSC 670. Organization of Information. Review. Metadata models Dublin Core Metadata Standards Dublin cor e, MARC Encoding Schemes HTML, XML, MARC… Advanced metadata concepts Schemas, application profiles. Questions?. Today. Guest speakers:

warner
Download Presentation

LBSC 670

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. LBSC 670 Organization of Information

  2. Review • Metadata models • Dublin Core • Metadata Standards • Dublin core, MARC • Encoding Schemes • HTML, XML, MARC… • Advanced metadata concepts • Schemas, application profiles

  3. Questions? INLS 520 – Fall 2007 Erik Mitchell

  4. Today • Guest speakers: • Metadata and information organization in digital libraries • eXtensibleStylesheet Language: • Learning the nuts and bolts of metadata transformation INLS 520 – Fall 2007 Erik Mitchell

  5. Guest Speakers • JennineKneiss • Thomas Whittaker INLS 520 – Fall 2007 Erik Mitchell

  6. Anatomy of a Digital Library

  7. Semantics & structure XSL Decision making Design & interactivity Connecting structure and style XHTML CSS

  8. Programming 101 • Definition: • The process of developing a step-by-step schematic for address a specific task • The process of organizing these steps using a specific encoding system • The manipulation of data to serve a specific information need

  9. Compiled Vs Scripting

  10. Definitions • Programming Language • “A formal language used to write instructions that can be translated into machine language and then executed by a computer.” (definitions) • Scripting Language • Run-time (does not require compilation) • Restricted context (requires a specific environment) • Functional / Object oriented • Definitions • Compiler / Interpreter • A program that builds and executes a program. Compilers create a self-executable file, interpreters read a text script at run-time

  11. The programming process • Analyze the problem • What do you want your program to do? • What are your users expecting, what data do you have? • Plan program flow/logic • What steps need to occur, in what order? • Useful tools include Step-Form, flowcharts, and pseudocode • Code the program • Create variables, routines, functions • Compile/run the program • Test, verify • Release

  12. eXtensibleStylesheets eXtensible Style Language (XSL) is a metadata schema that is encoded using XML and interpreted by Web-Browsers. The primary function of XSL is to transform XML documents. The XSL language features a set of programming constructs that support this function http://www.princexml.com/howcome/2007/xtech/papers/output/0082-32/index.xhtml

  13. XSLSample <?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="html"/> <xsl:template match="/dc"> Processing Instructions </xsl:template> </xsl:stylesheet>

  14. Contents of <xsl:template...> <html> <head> <title>Sample XSL transformation</title> </head> <body> <xsl:for-each select="*"> <p> <b> <xsl:value-of select="name(.)"/> <xsl:text>:</xsl:text> </b> <xsl:value-of select="./text()"/> </p> </xsl:for-each> </body> </html>

  15. XSL – Sample Stylesheet <?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/rss"> <html> <body> <xsl:for-each select="./channel/item"> <xsl:value-of select="title"/><br/> </xsl:for-each> </body> </html> </xsl:template> </xsl:stylesheet>

  16. XML RSS Record <?xml version="1.0"?> <rss version="2.0"> <channel> <title>Sample RSS File</title> <link>http://urltofile.xml</link> <description>This is a sample</description> <language>en-us</language> <pubDate>Tue, 10 Jun 2003 04:00:00 GMT</pubDate> <item>…</item> <item>…</item> <item>…</item> <item>…</item> </channel> </rss>

  17. WorkTime! • Get into groups and work through our XSL worksheet. • Ask questions • Pause for discussion

  18. XSL Control Structures • For Each • <xsl:for-each select=“/date”></xsl:for-each> • Choosing between options • <xsl:choose> • <xsl:when select=“contains(/URL, “.edu”)> • </xsl:when> • </xsl:choose> • If • <xsl:if test=“./title != ‘’> </xsl:if>

  19. XPath • A DOM-style syntax that allows us to access elements in an XML file • Examples • /dublinCore/title • Access the title of a DC record • /dulinCore/subject/@attribute • Access an attribute of the subject element • /dublinCore/

  20. Xpath (2) • Xpath functions • Contains (//item/title, ‘England’) • substring-before(string1, string2), substring-after(string1, string2) • Xpath selectors • //elementname – finds an element anywhere in the DOM • ./ - from the current context • / - from the root context • * - wildcard match

  21. Wrap-up • Questions about Assignment 2? • Next week – Classification! • Course feedback: • http://bit.ly/lbsc670_questions

More Related