Extract XML from an XML File

Question

Hi All,
I have an xml file from which data has to be extracted and inserted into table. XML file looks like this..
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE labels SYSTEM "label.dtd">
<labels FORMAT="Harvest Label for Lot Project" QUANTITY="1" PRINTERNAME="PFP3400E006" JOBNAME="JA272017">
<label>
<variable name= "ITEM">PM191_JTEST</variable>
<variable name= "ITEM_DESC">6 Pack Blue Assembled 2004 JTEST</variable>
<variable name= " LOT ">ja28-10</variable>
<variable name= "QUANTITY">1</variable>
</label>
</labels>
In the above xml, if i remove <!DOCTYPE labels SYSTEM "label.dtd"> and use the below query, I am able to get the details.
SELECT EXTRACTVALUE(VALUE(x), 'labels/@_FORMAT') format
,EXTRACTVALUE(VALUE(x), 'labels/@_QUANTITY') QUANTITY
,EXTRACTVALUE(VALUE(x), 'labels/@_PRINTERNAME') PRINTERNAME
,EXTRACTVALUE(VALUE(x), 'labels/@_JOBNAME') JOBNAME
FROM (SELECT XMLTYPE
('<?xml version="1.0" encoding="UTF-8" standalone="no"?> <labels FORMAT="Harvest Label for Lot Project" QUANTITY="1" PRINTERNAME="PFP3400E006" JOBNAME="JA272017"> <label> <variable name= "ITEM">PM191_JTEST</variable> <variable name= "ITEM_DESC">6 Pack Blue Assembled 2004 JTEST</variable> <variable name= " LOT ">ja28-10</variable> <variable name= "QUANTITY">1</variable> </label> </labels>' ) xml
FROM DUAL),
TABLE(XMLSEQUENCE(EXTRACT(xml, 'labels'))) x
But <!DOCTYPE labels SYSTEM "label.dtd"> tag is there means then i am getting error as
Invalid resource handle or path name "/label.dtd"
Please let me know how we can parse the xml and insert into table. OR how can i remove <!DOCTYPE labels SYSTEM "label.dtd"> tag and process it further.
Thanks and Regards,
Mahesh
Edited by: magu on Sep 2, 2009 3:15 PM
Edited by: magu on Sep 2, 2009 3:16 PM

Answer 1

I don't understand why the DOCTYPE is in the XML, but it appears that Oracle is trying to resolve label.dtd to a registered resource. As you discovered, it may be easier to remove the DOCTYPE from the XML then try to register the label.dtd resource within Oracle. To do this, some options are
- Use the REPLACE command
- treat the data as a CLOB and instr/substr to build a new clob without the DOCTYPE tag in it.
- Use the REGEXP_REPLACE command
Also, if your DB version supports XMLTable, here is the way to do it with that.
SELECT *
  FROM XMLTABLE('/labels'
                PASSING XMLTYPE('<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<labels _FORMAT="Harvest Label for Lot Project" _QUANTITY="1" _PRINTERNAME="PFP3400E006" _JOBNAME="JA272017">
     <label>
          <variable name="ITEM">PM191_JTEST</variable>
          <variable name="ITEM_DESC">6 Pack Blue Assembled 2004 JTEST</variable>
          <variable name=" LOT ">ja28-10</variable>
          <variable name="QUANTITY">1</variable>
     </label>
</labels>
                COLUMNS
                format    VARCHAR2(15) PATH '@_FORMAT',
                quantity  VARCHAR2(15) PATH '@_QUANTITY',
                printername  VARCHAR2(15) PATH '@_PRINTERNAME',
                jobname  VARCHAR2(15) PATH '@_JOBNAME');