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Use XML with ABL Applications

Recommended resources for learning XML basics

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Table of Contents
  • Develop with XML in OpenEdge
    • About XML
      • Role of XML
      • Benefits of XML
      • Benefits of ABL XML development in OpenEdge
      • Benefits of SOA XML development in OpenEdge
      • Recommended resources for learning XML basics
    • Develop XML-enabled ABL applications with DOM
      • DOM advantages
      • DOM limits
      • ABL support
      • More information
    • Develop XML-enabled ABL applications with SAX
      • SAX advantages
      • SAX limits
      • ABL support
      • More information
    • Serialize ABL temp-tables and ProDataSets to and from XML
      • Features
      • Use cases
      • ABL support
      • More information
  • Read and Write XML with the Document Object Model (DOM)
    • XML terminology
      • XML document structure
        • XML prolog
        • XML body
        • DTDs and XML Schema documents
        • XML elements
        • XML attributes
        • XML empty elements
        • XML entities
        • XML namespaces
    • The ABL DOM interface
      • Prerequisites
      • Represent an XML document in ABL DOM
      • Represent a DOM node in ABL
    • Create XML output from ABL
      • The root node reference object
      • Create and append a node
      • Set node attributes and values
      • Example of creating an output XML file
        • Insert a document fragment into an XML file
        • Write an XML file to a MEMPTR, a stream, or a LONGCHAR
    • Read XML input into ABL
      • Load an XML file
        • Load an XML file from a LONGCHAR
        • Load an XML file from a MEMPTR
      • Access the child nodes
        • Use node attributes and values
      • Examples of reading an input XML file
    • Namespaces
    • Internationalization
    • Error handling
    • Validation
    • Method and attribute summary
  • Read XML Documents with the Simple API for XML (SAX)
    • Explore ABL SAX
      • SAX-reader object
      • ABL SAX callbacks
      • SAX-attributes object
        • Retrieve data from a SAX-attributes object
        • Create a SAX-attributes object
      • Validate an XML document
      • Namespace processing
        • Namespace declarations
        • Effects of namespace processing
      • Parse an XML document
      • Monitor the state of the parse
      • Error handling
    • Develop ABL SAX applications
      • Basic tasks of an OpenEdge SAX application
      • Retrieve names and phone numbers example
        • Without namespace processing
        • With namespace processing
      • Read customer data and write to a TEMP-TABLE example
    • ABL SAX and WebSpeed
      • Read XML data with WebSpeed example
      • SAX and the AppBuilder
        • Store and recall context information
        • Context management example
      • Read an XML file using methods as callback
    • SAX API reference
      • SAX error message reference
      • SAX callback reference
        • Characters
        • EndDocument
        • EndElement
        • EndPrefixMapping
        • Error
        • FatalError
        • IgnorableWhitespace
        • NotationDecl
        • ProcessingInstruction
        • ResolveEntity
        • StartDocument
        • StartElement
        • StartPrefixMapping
        • UnparsedEntityDecl
        • Warning
  • Write XML Documents with the Simple API for XML (SAX)
    • SAX-writer overview
    • Create a SAX-writer
    • Configure a SAX-writer
    • Write an XML document
    • Examples
      • Create an XML document from database data
      • Envelope information example
      • Concurrently read and write XML documents
    • Use namespaces
    • Error handling
      • How errors are handled when STRICT is FALSE
      • How errors are handled when STRICT is TRUE
      • Errors raised by invalid method calls during SAX-writer states
      • Change values in the WRITER-STATUS attribute example
      • Handle codepage conversions
  • Read and Write XML Data from Temp-Tables and ProDataSets
    • Introduction
      • Use cases
      • Other XML features
    • Methods and attributes
      • Attribute interactions
        • NAMESPACE-URI and NAMESPACE-PREFIX
        • XML-NODE-NAME and SERIALIZE-NAME
        • XML-NODE-TYPE and SERIALIZE-HIDDEN
      • ABL-specific attributes in XML Schema
    • Read XML Schema into a temp-table, temp-table buffer, or ProDataSet
      • Create a dynamic temp-table with XML Schema
      • Verify a static temp-table against XML Schema
      • Create a dynamic ProDataSet with XML Schema
    • Read XML into a temp-table, temp-table buffer, or ProDataSet
      • Schema locations
      • Read XML data into temp-tables
      • Add XML data to a populated temp-table
      • Read XML into a ProDataSet
      • Read before-image data for ProDataSet temp-table buffers from XML
    • Write XML Schema from a temp-table, temp-table buffer, or ProDataSet
      • Write a temp-table definition to XML Schema
      • Write a ProDataSet definition to XML Schema files
    • Write XML from a temp-table, temp-table buffers, or a ProDataSet
      • Write temp-table data to XML
      • Write XML from a temp-table buffer's current row
      • Write a ProDataSet to XML
      • Minimize XML document size
      • Omit foreign key fields in nested child records
      • Omit fields with initial values
    • ProDataSet to XML round-trip example
      • Map ABL names to different XML element or attribute names
    • Use XML Schema
      • Create dynamic ABL objects from XML Schema
      • Verify XML Schema against ABL definitions
      • Infer definitions from XML data
        • Infer schema for a temp-table
        • Infer schema for a ProDataSet
      • Infer data-relations from nested XML and XML Schema
      • Additional XML support examples
        • Simple example of a PARENT-ID-RELATION
        • XML schema with root element mapping to a temp-table
        • XML schema with no explicit field definition for a parent table
        • XML schema with parent table fields after nested child tables
        • XML schema with parent table fields interspersed among child tables
      • ABL representation of temp-tables and ProDataSets as XML Schema
        • Namespaces
      • ABL-specific attributes on temp-table and ProDataSet definitions
      • Represent temp-tables in XML Schema
      • Represent indexes in XML Schema
      • Represent data-relations in XML Schema
  • XML Schema and ABL Data Type Mappings
    • Default mappings between ABL data types and XML Schema data types
    • Default mappings from other XML Schema data types to ABL data types
  • ABL to IANA Mappings
    • ABL to IANA code page mappings
  • Command and Utility Reference
    • bproxsdto4gl utility
Table of Contents

Recommended resources for learning XML basics

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  • Last Updated: January 17, 2024
  • 1 minute read
    • OpenEdge
    • Version 12.8
    • Documentation

For XML learning, the basic definition documents and tutorials available from the W3C are a good first step. You can browse the available XML tutorials at this web site:

https://www.w3schools.com/xml/

The following book is an excellent reference to XML and related technologies:

Essential XML Quick Reference: A Programmer's Reference to XML, XPath, XSLT, XML Schema, SOAP, and More by Aaron Skonnard and Martin Gudgin, published by Addison-Wesley (ISBN: 0201740958)

Progress Education Community also offers an in-depth class that is available over the Internet:

  • OpenEdge Development with XML

Information about this class can be found at this address:

https://wbt.progress.com
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