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from XML doc to DTD

Posted on 2004-04-29
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Last Modified: 2013-11-19
how to convert from XML document to DTD using jbuilder
i do the fooling but not yet could solve the problem

this program convert from db to xml (supposed to do that)

 out.write("<" + el.getNodeName() + ">");
          out.flush();

          for (int r = 0; r < tablesinfo[b].tsize; r++) {
            System.out.println("\n - r = " + r);
            System.out.println("\n - table parent = " +
                               tablesinfo[b].columns[r].parent);

            if (tablesinfo[b].columns[r].parent.compareTo(tablesinfo[b].tname) ==
                0) {
              if (tablesinfo[b].columns[r].ctype.compareTo("ID") == 0) {
                Attr attr = doc.createAttribute(tablesinfo[b].columns[r].cname);
                attr = el.setAttributeNode(attr);
                out.print("<" + tablesinfo[b].columns[r].cname + ">");
                out.flush();
                out.print("</" + tablesinfo[b].columns[r].cname + ">");
                out.flush();

              }
              else {
                // Create Table's original columns NODES!
                Element c = doc.createElement(tablesinfo[b].columns[r].cname);
                el.appendChild(c);
                out.print("<" + c.getNodeName() + ">");
                out.flush();
                out.print("</" + c.getNodeName() + ">");
                out.flush();

                Node parent = c.getParentNode();
                c = (Element) parent;
              }
            }
            else {
              // Create NEST Node's Nodes...
              nest[countnest] = tablesinfo[b].columns[r].parent;
              System.out.print(" - Subelement#" + countnest + nest[countnest] +
                               "has cols : ");
              countnest++;
              sube = doc.createElement(nest[countnest - 1]);
              el.appendChild(sube);
              out.print("<" + sube.getNodeName() + ">");
              out.flush();

              do {
                System.out.println("- Col#" + r + " is :" +
                                   tablesinfo[b].columns[r].cname);
                Element c = doc.createElement(tablesinfo[b].columns[r].cname);
                sube.appendChild(c);
                out.print("<" + c.getNodeName() + ">");
                out.flush();
                out.print("</" + c.getNodeName() + ">");
                out.flush();
                r++;
              }
              while ( (r < tablesinfo[b].tsize) &&
                     (tablesinfo[b].columns[r].
                      parent.compareTo(nest[countnest - 1]) == 0));
              out.print("</" + sube.getNodeName() + ">");
              out.flush();
              r--;
            }

          }
          out.write("</" + el.getNodeName() + ">");
          out.flush();
        }
      }

      out.print("</" + rootEl.getNodeName() + ">");
      out.flush();
      out.close();
    }

    catch (Exception e) {
      e.printStackTrace(System.err);
    } //end catch
  }
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Question by:ousa
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4 Comments
 

Accepted Solution

by:
joshuasherlock earned 125 total points
ID: 11012009
If you just want to create a one off DTD based on the XML you can try XMLSPY 2004 (www.altova.com). this will auto generate a DTD for you. However, as you are decided the format of the XML programatically you could write a generic DTD that defines the format that you expect your program to produce.

Another alternative is to use XSLT and your databases XML extensions (for example, the Oracle XDK with XSQL). First, you would  to extract the data from the database in a standard XML format then use XSL to transform the XML into your desired format. Would reduce the amount of coding needed but would require a bit of a learning curve on XSLT.

With more information on the nature of the problem I may be able to be more specific
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Expert Comment

by:joshuasherlock
ID: 11709867
Thanks Modulo
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