Descriptive Statistics Descriptive Statistics describe a set of data.
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Transcript of Using XML to store Descriptive Metadata Richard Murphy Rosarie O’Riordan Central Statistics Office...
Using XML to store Descriptive Metadata
Richard Murphy Rosarie O’Riordan
Central Statistics Office
Ireland
Background
• Project to build a Corporate Data Warehouse
• Business Process Improvement Project to document all processes
• Data and Metadata now known
• How to gather all metadata into one structure?
Proposed Solution
• Use XML to build a metadata repository
• Scaleable and Web enabled
• Possibility of being integrated with core metadata
• Integration with further developments
Tools Used
• HTML [Hyper Text Markup Language]
• XML [EXtensible Markup Language]
• XSL [EXtensible Stylesheet Language]
• ASP [Active Server Pages]
– JavaScript [JavaScript is a scripting language]
XML HTML{EXtensible MarkUp Language} {Hyper Text Markup Language}
• XML is about describing information
• XML was designed to describe data, and to focus on what data is
• XML is a markup language much like HTML
• XML tags are not predefined in XML. You must define your own tags
• XML uses a Document Type Definition (DTD) or an XML Schema to describe the data
• HTML is about displaying information
• An HTML file is a text file containing small markup tags
• The Markup tags tells the Web brower how to display the page
• An HTML file can be created using a simple text editor
• HTML was designed to display data,
and to focus on how data looks.
XSL {EXtensible Stylesheet Language}
• There must be something in addition to the XML document that describes how the document should be displayed; and that is XSL!
• XSL consists of three parts:
– XSLT (a language for transforming XML documents)
– XPath (a language for defining parts of an XML document)
– XSL Formatting Objects (a vocabulary for formatting XML documents)
Critical Success Factors
• Infrastructural Issues
• Operational Issues
• Content Rules
• Official Corporate Policy
Future Developments
• Corporate ‘Look and Feel’
• Integrate with Core Data and Metadata
• Other Modules– Release Calendar– Access through Theme List– Publication Catalogue– Frequently Asked Questions– Glossary of Terms/Thesaurus
Future Developments ctd
• Scaleable to include new fields
• Archiving
• Version Control
• Rules and Standards
Other points
• Keep it simple
• Functionality = Complexity
• Multiple access points to metadata but– Store once reference many
• Workable Solutions n.e. High Tech
Thank You for Listening