visual basic barcode generator Data Exchange in Java

Creator PDF 417 in Java Data Exchange

Data Exchange
Decode PDF417 In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
Generating PDF 417 In Java
Using Barcode printer for Java Control to generate, create PDF 417 image in Java applications.
WSDL
Recognizing PDF-417 2d Barcode In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Bar Code Creator In Java
Using Barcode drawer for Java Control to generate, create bar code image in Java applications.
SOAP
Scanning Bar Code In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
PDF417 Generator In C#.NET
Using Barcode creation for Visual Studio .NET Control to generate, create PDF 417 image in VS .NET applications.
UDDI
PDF 417 Printer In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
Paint PDF-417 2d Barcode In Visual Studio .NET
Using Barcode printer for .NET framework Control to generate, create PDF-417 2d barcode image in VS .NET applications.
Dependence of data exchange, WSDL, SOAP, and UDDI on XML
Drawing PDF 417 In VB.NET
Using Barcode generation for VS .NET Control to generate, create PDF 417 image in .NET applications.
Encoding Barcode In Java
Using Barcode creation for Java Control to generate, create bar code image in Java applications.
Seven
Print ANSI/AIM Code 39 In Java
Using Barcode generation for Java Control to generate, create Code 39 image in Java applications.
UCC-128 Printer In Java
Using Barcode creation for Java Control to generate, create USS-128 image in Java applications.
Document
Generating ISSN In Java
Using Barcode drawer for Java Control to generate, create ISSN - 13 image in Java applications.
Code 39 Extended Generator In None
Using Barcode generation for Office Word Control to generate, create Code39 image in Word applications.
1 Element n
ECC200 Generator In None
Using Barcode printer for Software Control to generate, create DataMatrix image in Software applications.
EAN / UCC - 13 Maker In None
Using Barcode encoder for Online Control to generate, create EAN-13 Supplement 5 image in Online applications.
1 Data
Paint Code 39 Full ASCII In Java
Using Barcode creator for Android Control to generate, create Code 39 Extended image in Android applications.
Draw USS Code 39 In Objective-C
Using Barcode printer for iPad Control to generate, create Code 39 image in iPad applications.
n Attribute
Paint EAN-13 In Objective-C
Using Barcode printer for iPad Control to generate, create EAN / UCC - 13 image in iPad applications.
Creating Code 128A In Objective-C
Using Barcode generation for iPhone Control to generate, create Code 128 Code Set A image in iPhone applications.
The general structure of an XML document
contains a top element named address, which has a single attribute that s used to specify the country. This top element has also four child elements, which provide information on the name of the person, the street address, the city, and the postal code. Each of these child elements has data (that is, a payload) contained in them. For example, the data for the name element is John Smith .
Listing 7-1
Listing 7.1: Basic XML document structure 1 <address country="USA"> 2 <name>John Smith</name> 3 <street>43 Walcut St</street> 4 <city>Dublin</city> 5 <state>Ohio</state> 6 <postal-code>45561</postal-code> 7 </address>
The grammar and structure of an XML type document is defined in a schema. Another important concept used in XML is namespaces, which are used to avoid the collision of names in different spaces and to extend the use of vocabulary defined in one specific domain to other domains. We will discuss XML in detail in 11. The discussion will include schemas, namespaces, and various models to use for XML parsing, processing, creating, and editing. SOAP Although adoption of XML is an important step forward in dealing with heterogeneity and extensibility requirements, XML by itself it is not sufficient for two parties (the service provider and service consumer
Web Services Overview
applications) to properly communicate. For effective communications, the parties must be able to exchange messages according to an agreedupon format. Simple Object Access Protocol (SOAP) is such a protocol, providing a common message format for services. SOAP is a text-based messaging format that uses an XML-based dataencoding format. SOAP is independent of both the programming language and the operational platform, and it does not require any specific technology at the end points, thus making it completely agnostic toward vendors, platforms, and technologies. Its text format also makes SOAP a firewall-friendly protocol. Although SOAP was originally designed to work only with HTTP, any transport protocol or messaging middleware can be used to carry a SOAP message. The structure of a SOAP message is shown in Figure 7.6. The SOAP message is a complete (or valid) XML document, with the top element being the envelope element. The envelope element contains a body element and an optional header element. The body element usually carries the actual message, which is consumed by the recipient. The header element is generally used for advanced features for intermediate processors. A simple but complete example of a SOAP request for obtaining a stock quote is shown in Listing 7-2. The listing shows how a SOAP message is encoded using XML and illustrates some SOAP elements and attributes. As the listing shows, the top element in SOAP must be the envelope element, which must contain two namespaces. The namespace
SOAP Envelope SOAP Header Header Block 1 Header Block 2 . .
SOAP Body Body Sub element 1 Body Sub element 2 . .
Structure of a SOAP message
Seven
SOAP:encodingStyle indicates the SOAP encoding, and the other namespace connotes the SOAP envelope. The header element is optional, but when it is present it should be the first immediate child of the envelope element. The body element must be present in all SOAP messages and must follow the header element if it is present. The body usually contains the specification of the actual message. In this example, the message contains the name (GetLastTradePrice) of the method as well as an input parameter value (IBM).
Listing 7-2
Listing 7.2: An example of SOAP message <soap:envelope xmlns:soap="http://schemas.xmlsoap.org/soap/ envelope/" soap:encodingStyle="http:/schemas.xmlsoap.org/soap/encoding/"/> <soap:header> </soap:header> <soap:body> <m:GetLastTradePrice xmlns:m="http://example.org/ Tradeprice" > <tickerSymbol> IBM </tickerSymbol> </m:GetLastTradePrice> </soap:body> </soap:envelope>
WSDL Web Services Description Language (WSDL) is an XML-based language for describing the interface and other characteristics of a Web Service. This is the second application of XML to solve the heterogeneity problems mentioned earlier in this chapter. WSDL offers the following advantages in the description of the services as compared to previously described approaches:
Unlike CORBA s IDL and RPC s speci cation les, WSDL is more completely agnostic toward programming languages and middleware technologies. This feature of WSDL is the direct result of it being based on XML, thus making WSDL suitable to describe almost any type of service. WSDL provides a method of specifying a communication protocol for invoking a service. Therefore, a service is free to choose any protocol it can conveniently implement. WSDL also provides a way to specify a message format for communicating with a given service. Therefore, a service is free to choose any convenient message format. An example of a message format is SOAP.
Copyright © OnBarcode.com . All rights reserved.