Simple Transformation to deserialize an XML file into ABAP data structures?

I'm attempting to write my first simple transformation to deserialize
an XML file into ABAP data structures and I have a few questions.
My simple transformation contains code like the following
<tt:transform xmlns:tt=""
              xmlns:pp="" >
<tt:type name="REPORT" line-type="?">
  <tt:node name="COMPANY_ID" type="C" length="10" />
  <tt:node name="JOB_ID" type="C" length="20" />
  <tt:node name="TYPE_CSV" type="C" length="1" />
  <tt:node name="TYPE_XLS" type="C" length="1" />
  <tt:node name="TYPE_PDF" type="C" length="1" />
  <tt:node name="IS_NEW" type="C" length="1" />
<tt:root name="ROOT2" type="pp:REPORT" />
    <tt:loop ref="ROOT2" name="line">
          <tt:value ref="$line.COMPANY_ID" />
          <tt:value ref="$line.JOB_ID" />
               I don't know what to do here (see item 3, below)
          <tt:value ref="$line.IS_NEW"
          map="val(' ') = xml('false'), val('X') = xml('true')" />
1. In a DTD, an element can be designated as occurring zero or one
time, zero or more times, or one or more times. How do I write the
simple transformation to accommodate these possibilities?
2. In trying to accommodate the "zero or more times" case, I am trying
to use the <tt:loop> instruction. It occurs several layers deep in the
XML hierarchy, but at the top level of the ABAP table. The internal
table has a structure defined in the ABAP program, not in the data
dictionary. In the simple transformation, I used <tt:type> and
<tt:node> to define the structure of the internal table and then
tried to use <tt:loop ref="ROOT2" name="line"> around the subtree that
can occur zero or more times. But every variation I try seems to get
different errors. Can anyone supply a working example of this?
3. Among the fields in the internal table, I've defined three
one-character fields named TYPE_CSV, TYPE_XLS, and TYPE_PDF. In the
XML file, I expect zero to three elements of the form
<ExportType exporttype='csv' />
<ExportType exporttype='xls' />
<ExportType exporttype='pdf' />
I want to set field TYPE_CSV = 'X' if I find an ExportType element
with its exporttype attribute set to 'csv'. I want to set field
TYPE_XLS = 'X' if I find an ExportType element with its exporttype
attribute set to 'xls'. I want to set field TYPE_PDF = 'X' if I find
an ExportType element with its exporttype attribute set to 'pdf'. How
can I do that?
4. For an element that has a value like
in the simple transformation, the sequence
<ErrorCode>  <tt:value ref="ROOT1.CODE" />  </ErrorCode>
seems to work just fine.
I have other situations where the XML reads
<IsNew value='true' />
I wanted to write
        <tt:value ref="$line.IS_NEW"
        map="val(' ') = xml('false'), val('X') = xml('true')" />
but I'm afraid that the <tt:value> fails to deal with the fact that in
the XML file the value is being passed as the value of an attribute
(named "value"), rather than the value of the element itself. How do
you handle this?

Try this code below:
data  l_xml_table2  type table of xml_line with header line.
W_filename - This is a Path.
  if w_filename(02) = '
    open dataset w_filename for output in binary mode.
    if sy-subrc = 0.
      l_xml_table2[] = l_xml_table[].
      loop at l_xml_table2.
        transfer l_xml_table2 to w_filename.
    close dataset w_filename.
    call method cl_gui_frontend_services=>gui_download
        bin_filesize = l_xml_size
        filename     = w_filename
        filetype     = 'BIN'
        data_tab     = l_xml_table
        others       = 24.
    if sy-subrc <> 0.
      message id sy-msgid type sy-msgty number sy-msgno
                 with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.

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