XML DOM Processing in ABAP part I - Convert an ABAP table into XML file using SAP DOM Approach.

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h4. Introduction    With NetWeaver 04 SAP introduced simple transformations, a new way of converting XML directly into ABAP tables, structures and fields. Tobias Trapp (/people/tobias.trapp/blog) wrote 5 weblogs about this topic with the title XML processing in ABAP. However the success of these great weblogs, you must have at least a SAP WAS 6.40 environment and you have to learn the Simple Transformation Language. At first another solution was introduced by SAP into the SAP kernel of version 4.6D. This implementation is called the iXML package and could be accessed using and ABAP Object class CL_IXML and about 40 ABAP Object interfaces IF_IXML*. In this weblog I will focus on the possibilities of SAP XML Document Object Model (DOM) processing at the ABAP stack. My objective is to explain how you can use it in abap mapping. For this I split this weblog into three parts. This first part will focus on the conversion of an abap table into an xml file. The second part  (/pub/wlg/2702) will deal with the use of SAP DOM within XI abap mapping, introduced with SAP XI 3.0.      h4. The XML    In this weblog part we will create an xml file on the user’s computer based on data from an SAP system. First we will fill an internal table with SAP data.        Next we will create a document object using an iXML factory. This document can be filled with the data of the internal table. The document object can be represented as a tree structure, the so called Document Object Model or SAP DOM..          After filling the document object, we will transfer it into a XML stream. This stream is the binary version of the XML file and can be represented as a string, an xstring or a table with binary fields.