DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-1 COS 346 Day 24

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-2 Agenda Questions? Quiz 3 Corrected –1 A, 2 B’s and 4 C’s Quiz 4 is on May 4 –DP Chap & 15 –Skipping chapter 14 Capstone Progress reports Due Assignment 9 is Due Assignment 10 is posted due May 1 Assignment 11 is posted due May 4 Capstones projects and presentations are due May 12 at 10AM Today we will be discussing XML and ADO.NET

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-3 David M. Kroenke’s Chapter Thirteen: XML and ADO.NET Part One Database Processing: Fundamentals, Design, and Implementation

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-4 Introduction Database processing and document processing need each other. –Database processing needs document processing for transmitting database views. –Document processing needs database processing for storing and manipulating data. As Internet usage increases, organizations want to make their Web pages more functional by displaying and updating data from organizational databases.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-5 XML XML, or Extensible Markup Language, was developed in early 1990s: –XML is a subset of SGML, or Standard Generalized Markup Language. Today XML is a hybrid of document processing and database processing. –It provides a standardized yet customizable way to describe the content of documents. –XML documents can automatically be generated from database data, and vice versa. SOAP (which formerly stood for Simple Object Access Protocol but is now just a name instead of an acronym) is an XML-based standard protocol for sending messages of any type, using any protocol over the Internet.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-6 XML (Continued) XML is used for describing, representing, and materializing database views. XML is better than HTML because: –It provides a clear separation between document structure, content, and materialization. –It is standardized but allows for extension by developers –XML tags accurately represent the semantics of their data. Document Type Declarations (DTDs) and XML Schemas can be used to describe the content of XML documents. Both Oracle and SQL Server can produce XML documents from database data.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-7 XML DTD An XML document consists of two sections: –Document Type Declaration (DTD). The DTD begins with DOCTYPE –Document data. An XML document can be: –Type-valid if the document conforms to its DTD. –Well-formed and not type-valid, if It violates the structure of its DTD, or It has no DTD. A DTD may be stored externally so many documents can be validated against the same DTD.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-8 XMLSpy The diagrams in the text and in the following slides were prepared with Altova’s XMLSpy. Altova’sXMLSpy There is a free Home version of XMLSpy 2006 available at: ents.html ents.html

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-9 XML Document with Internal DTD

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall XML Document with External DTD

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall External DTD for CustomerList

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall 13-12

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall XML Document with Two Customers

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall XSLT XSLT, or the Extensible Style Language may be used to materialize (transform) XML documents using XSL document. –From XML documents into HTML or into XML in another format. XSLT is a declarative transformation language: –Declarative: create rules, not procedures, to materialize the document. –Transformational: transforms the input document into another document. XSLT uses stylesheets to indicate how to transform the elements of the XML documents into another format.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Example XSL Stylesheet

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Example HTML in Browser

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall David M. Kroenke’s Database Processing Fundamentals, Design, and Implementation (10 th Edition) End of Presentation: Chapter Thirteen Part One

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall David M. Kroenke’s Chapter Thirteen: XML and ADO.NET Part Two Database Processing: Fundamentals, Design, and Implementation

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall XML Schema XML Schema is a standard for describing the content of an XML document, i.e., defining custom vocabularies: –Documents that conform to an XML Schema are called schema- valid. –An XML document can be well-formed and be neither type-valid nor schema-valid. Unlike DTDs, XML Schema documents are themselves XML documents that can be validated against the schema maintained by W3C.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall XML Schema Document

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Schema-Valid XML Document

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Elements and Attributes Schemas consist of elements and attributes: –Elements are used to carry data and attributes are used to carry metadata. Two types of elements: –Simple elements have a single data value. –ComplexType elements can have one or more simple or ComplexType elements. ComplexType elements can have attributes.

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Flat Schemas: XML Schema Flat schemas have all elements at the same level:

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Flat Schemas: Schema-Valid Document

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Flat Schemas: SGraphical Representation of Schema

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Structured Schemas: XML Schema Structured schemas have defined subgroups:

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Structured Schemas: Schema-Valid Document

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall Structured Schemas: Graphical Representation of Schema

DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall David M. Kroenke’s Database Processing Fundamentals, Design, and Implementation (10 th Edition) End of Presentation: Chapter Thirteen Part Two