introduction to xml for soa

Another PillowTalk Presentation2004 Dynamic Systems, Inc.

Lburst@dynamicsys.comhttp://www.dynamicsys.com

Introduction to XML for SOA

Lee H. Burstein, President

2525 Justin Lane

Wilmington, DE 19810-2223

302-477-0180

2004 Dynamic Systems, Inc. Lburst@dynamicsys.com

http://www.dynamicsys.com

Topics

Introduction Where used Structure What is neeeded Short comings How can we use it

Introduction

It’s really eXtensible Markup Language A set of standards defining a toolkit for describing

data HTML describes how information is displayed Both use tags

XML tags tend to be user defined, must be balanced and is highly structured

Need a Schema or DTD

Where Used

Where Used? US Government

IRS DOD SEC

Compliment/replacement for EDI Healthcare, banks, retail, wholesale RPC

SOAP Web services SOA

Represent multivalue data in a relational database

For Example

XBRL eXtensible Business Reporting Language Standard tags for financial reporting

Period, Current Assets, Balance Sheet, etc. www.serence.com, download Klipfolio

Uses XML to define properties FusionWare XML Server

Uses XML to combine data from dissimilar data sources into one web presentation

Oracle, DB2, SQL Server have XML data types

Structure

Text document containing balanced, nested tags starting with an XML declaration

Tags denote fields and are self describing Tags can have attributes

Processing Tag Structure

<? processing instructions ?>Special tag containing

Processing instructions.Begins with <?Ends with ?>

Data Tag Structure

Opening tag Element Closing tag

Data Tag Structure

</TagName>

Attribute

XML Declaration Tag

<?xml version="1.0" encoding="ISO-8859-1"?> This identifies the document as XML conforming

to version 1.0 specification Using character encoding for Latin-1

XML Data

<?xml version=“1.0” encoding=“ISO-8859-1”?>

<LastName>Burstein</LastName>

</Record>

MultivalueData

Comment

Namespaces

Namespaces can be defined to prevent tag naming conflicts

A tag associated with a namespace helps guarantee its uniqueness

Namespaces

<dsi:Customer xmlns:dsi=“http://www.dynamicsys.com/Cust”><dsi:Record ID=1234>

<dsi:FirstName>Lee</dsi:FirstName></dsi:Record>

</dsi:Customer><f:Customer xmlns:f=“http://www.somewhere.com/stuff”>

<f:Record ID=1234><f:FirstName>Sam</f:FirstName>

<f:Record></f:Customer>

What Is Needed

What is needed?

XML describes data only No display information

What is displayed How is it displayed

No validation

Document Type Definition This is the old way of describing and validating

XML Cannot support data types or complex

relationships The DTD is referenced in the XML document

<!DOCTYPE Customer SYSTEM “Cust.dtd”> An error is generated if your XML does not

conform to your DTD

XML Schema

W3C recommendation DTD alternative written in XML Validates XML Supports data types Can define data patterns, ranges, defaults More powerful, understandable and flexible that

DTDs Stored in an XSD file

XSD Schema

</schema>

eXtensible Stylesheet Language Stylesheet language (like CSS) for XML You will use a combination of Xpath,

XSLT and XSL-FO to Select the part of the XML document to display Transform it Format it

Query language for extracting elements from an XML document

Result is dependant upon where you are in the XML document The same syntax could return different results

eXtensible Stylesheet Language for Transformation

Select the value of one node Select the values of all nodes of the same

name Conditionally select value Sort results

XSL-FO

XSL Formatting Objects Defines page layout, regions of a page Output can be a variety of formats

PDF RTF TXT PostScript

Short Comings

Short comings

Remember, this is a standard that continues to evolve

Requires bandwidth Heavyweight protocol There is a lot to put together

How Can We Use It

How can we use it?

Quite easy to write a program to export data in a proper XML structure

Most, if not all, databases have tools to read and write XML data using a XSL or DTD

Relational data bases now have XML data type SOAP Web Services SOA

Simple Object Access Protocol XML based Can be used for

Messaging systems RPC Distributed processing

Structure is quite specific Cannot use DTD’s

Web Services

Uses SOAP, XML (Web Service Description Language), HTTP

An object’s methods are publicly exposed You can use them in your applications You can expose portions of you application

to the world

Service Oriented Architecture Collection of services that communicate with each

other Services are loosely coupled

From different applications On different servers Using different databases

Using XML and Web Services to communicate

Can I Do This?

Sure! All multivalue applications can be accessed

via .net All multivalue applications can be accessed via

java All multivalue applications can be accessed via

XML You may need to separate screen I/O from

business logic

Why Would I Want To?

You control what discrete portions of your application are available via SOA

Improve customer and vendor communication and access to information

Horizontal parts of your application can be generally available increasing your exposure

Provide On-Demand access to your application

Resources

www.w3schools.com msdn.microsoft.com/xml www.xml.com www.xmethods.net www.w3.org www.develop.com/xml www.xbrl.org http://webservices.xml.com/pub/a/ws/2003/09/30/soa.html http://www.service-architecture.com/

introduction to xml for soa

xml conforming

xml declarationtags

klipfoliouses xml

xml documentthe

xml documentresult

data patterns

proper xml structuremost

xml documentan error

Documents

the soa/xml threat model and new xml/soa/web 2.0 ... con...

xml schema design - trivadis.com · soa guidelines – xml...

soa and xml

5/9 curso jee5, soa, web services, esb y xml

network approach in enabling soa - cisco · improve the...

xml...

6/9 curso jee5, soa, web services, esb y xml

high performance security for soa and xml web services using...

8/9 curso jee5, soa, web services, esb y xml

soa appendix b xml fundamentals august 2010

soa workshop module1 - introduction to soa

9/9 curso jee5, soa, web services, esb y xml

xml appliances for soa and web 2.0

1/9 curso jee5, soa, web services, esb y xml

recruitment agency based on soa and xml web...

introduction & soa

oracle soa suite 11g introduction to soa

1. Übung zur vorlesung - se.uni-hannover.de · soa und...

soa introduction

7/9 curso jee5, soa, web services, esb y xml