SAP Data Services supports a number of file formats for Data Extraction and processing. XML Files is one the key input formats for Data Services.
This document explains in details how to import and process a XML file into Data Services. This document also covers a key Transform – XML Pipeline, to process the data.
We have a XML file that we need to process and import into Data Services. Have named the file as Test_Demo.xml.
To see the contents of the file right click and Open with Notepad.
The XML file looks like this as below.
Double clicking on the XML it open in html format and looks like.
To start processing the XML File, we will have to create a XML schema(XSD) for the XML . This is because, Data Services does not take XML as input. It reads the schema which calls the file for processing (Explained in detail below) .
Converting XML document to generate XML schema in XSD format. There are many online tools available to generate XSD schema form a XML document.
I have used the one available at – https://www.liquid-technologies.com/online-xml-to-xsd-converter
Copy and paste your xml from the notepad into the space above.
Once it is pasted, Click on Generate schema. If the document is valid, it will give amessage as below.
The converter creates 2 schemas for the xml provided. This is because the xml generated is for a report which contains Header and Transactions.
If you see closely at Schema 0, you will it is calling Schema 1 from within.
Copy both schema 0 and schema 1 in notepad and save files and Schema0.xsd and schema1.xsd.The 2 xsd files should look like below.
Use this into Data Services as Input. Login into Data Services to start processing. Please make sure the files XML and XSD are placed at the locations where Data Services can access it. I have placed them into the FTP server which Data Services can access.
When you login into Data Services into your Local Repository. click on File formats as below.
Right click on Nested Schemas, New, XML Schemas .
The format for importing XML schema looks like this.
Once you select the schema0.xsd as Filename/URL , it will automatically gives you Namespace and Root Element name, These details are important to process the XML schema. I have named the format at TEST_DEMO.
The File format is now created and available for processing.
Create a new job to read and process the schema. For demo I have created a Job- JB_READ_XML_DATA with one Data Flow – XML_DEMO .
Drag and drop TEST_DEMO nested schema into Data Flow and select Make File Source.
Once the XSD Schema is showing in the Project Area, double Click on it.
Double Click should show the details of the schema that came with it.
This is important step as you now must select the XML File that this schema is made of. Click File and Select the TEST_DEMO.XML
Once the File is selected Click back and get into the work area again.
To process the data and to extract the right set we will use the Data Integrator Transform – XML_PIPELINE. XML_PIPELINE Transform.
Drag and drop XML_PIPELINE into the Work area and connect the schema to it.
Double Click on XML_PIPELINE and the Transform area would look as below.
Next Step is to Drag and Drop the fields in the output field on the right hand side . make sure you only select the fields and not the structures. Once all the required fields are mapped the Transform would look like as below.
Next Step is to map to the Target table to hold the XML Data being extracted.
The job and project area looks like below once you save the job.
Execute the job and see the processing steps.
Once jobs is Finished, click on the table preview and you can see data from XML has been successfully imported.
With this Post you will be able to read XML based Source Data Files into SAP Data Services for processing. XML in itself can be very complex and this document will help in generating the correct schema which can then be consumed in Data Services . Once schema can be used for multiple files if they are based on same schemas.
In this article we will discuss about how to generate java classes from XSD in Eclipse IDE.We are going to use MOXy JAXB implementation which is available as part of Eclipselink project.
Tools Used :
Download EclipseLink from here and extract the zip file in your local. We need this for MOXy which is an implementation of JAXB API.
In this article we will discuss about how to generate java classes from XSD in Eclipse IDE.We are going to use MOXy JAXB implementation which is available as part of Eclipselink project.
Tools Used :
Download EclipseLink from here and extract the zip file in your local. We need this for MOXy which is an implementation of JAXB API.
Steps to generate Java classes from XSD in Eclipse :
Follow the steps below to generate Java classes from XML Schema in Eclipse IDE.
Step 1: Create JAXB project
Open Eclipse IDE and create a new JAXB project which can be done by navigating to File-> New -> Other -> JAXB -> JAXB Project.Select JAXB Project and click Next.
Step 2: Assign name of your ProjectCreate Sample Xml From Xsd
Enter the project name as JavaFromXsd and make sure jre7 is selected as the Target runtime and JAXB version as 2.2.If your project is using jre6 then you have to use JAXB version as 2.1. and Click Next -> Next.
Step 3: JAXB Facet Setup
In JAXB Facet window, select 'Generic JAXB 2.1' as platform with JRE as JAXB implementation as shown below and click Finish.
Step 4: Create XSD file
Right click on 'src' and create a new package 'com.example.jaxb.schema'. Now create a new XSD file inside this package. To create a new XSD file, Right click on package -> New -> Other.-> XML -> XML Schema File and click Next.
Select the location and enter the file name as 'employeerequest.xsd'. Copy the following code in XSD file.
employeerequest.xsdStep 5: Adding jar files to Project
We need to add MOXy JAXB implementation JAR files in the project classpath.Follow the steps below to do the same.
Right Click on your Project and select New-> folder provide the name of folder as lib and click Finish. Now copy com.sun.tools.xjc.[version number].jar,com.sun.xml.bind.[version number].jar,javax.xml.bind.[version number].jar in lib folder. You can found these jars in extracted [DOWNLOADED_ECLIPSELINK_FOLDER]/jlib/moxy folder. Right click on your JAXB Project-> Build Path-> Configure Build Path and select Libraries tab from right side and click on Add External JARs.Add all the jars oflib folder.
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Step 6: Generating Java classes
Right click on your package -> New -> Other. -> JAXB -> JAXB Classes from Schema.
Click Next and select Project (JavaFromXsd) and click Next.
Select schema to generate classes from and click Next.
Enter the package name 'com.example.jaxb.generated' for the generated Java classes and Click Next-> Next-> Finish(dont change default values while navigating).
After Finishing Click OK if you are getting any Warnings.You will see the following message displayed in the console.
You can see the generated classes in Project explorer
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To suppress Schema enumeration, specify 0.
An XSD (XML Schema Definition) is required for running structure validation checks on a Web content file. IntelliJ IDEA can scan any XML file for the existing elements and attributes and generate a Schema for it.
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To generate a Schema based on an XML document
Procedures:Reference:
Features:
Fill in the editors below and it will automatically check if your XML conforms to XSD.
If you want use the XML to XSD converter or the XSD to XML converter, please fill in only the desired editor and click the appropriate conversion button.
You can see the user guide to help you to use this online XSD tool. It is a beta version. Do not hesitate to report a bug or give feedback.
Options for XSD from XML
Options for XML from XSD
User guide
Online XSD tools
This Online XML Schema Validator tool allows you to validate that your XML conforms to the specified schema.
If your document is not valid, the errors will be displayed, you will be able to make the necessary corrections.
This utility also allows you to generate XML examples from XSD. An XML example often makes it easier to understand the XML schema, because it is rarely very readable.
You can also generate XSD from an XML. This saves time and allows you to have a good basis.
All treatments are done locally directly in the browser, your documents are not sent to our server.
This tool uses xml.js library. It is an Emscripten port of libxml2's xmllint command.
What is XML Schema?
The XML Schema definition language (XSD) allows to define the structure and data types for XML documents. It contains a set of rules to which an XML document must conform in order to be valid. It is the current standard schema language, it is a recommendation of the World Wide Web Consortium (W3C). It is an alternative to Document type definition (DTD).
XSD defines:
XML Schema can be used by developers to check XML document, for example to verify a SOAP response. If the XML document does not conform to the XML schema, the SOAP response is wrong.
XML Schema can be complicated to understand and use for a novice (especially for a non-developer), the spec is very long. The XML schema generators from xml can help to create a Schema XML.
XML Schema uses XML syntax, a XSD is a XML document! This avoids having to use another format. XSD Example
XML Example conforms to the XML Schema
XSD supports several primitive data types: boolean, string, decimal, float, double, date, dateTime, base64Binary, .. Then, it is possible to create complex types.
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