get data stored in xml of pdf-form itself at the runtime

Hello,

I generate a pdf form with some data includet e.g. firstname = dave. personID = 12345.

all this data (import-parameter is a table) is "stored" in the xml of my form:

<?xml version="1.0" encoding="UTF-8"?>
<xfa:data xmlns:xfa="http://www.xfa.org/schema/xfa-data/1.0/">

   <data>

      <IF_TABLE_PERSON>

           <DATA xfa:dataNode="dataGroup">

                <FIRSTNAME>Dave</RFIRSTNAME>

               <PERSONID>12345</PERSONID>

firstname is binded to a textfield therefore there is no problem to get it.

because it is a table i could get the value in several ways:

a) myFirstNameField.rawValue;

b) this.resolveNode("$record.IF_TABLE_PERSON.DATA[1]").FIRSTNAME.value;

The PartnerID must not be binded anywhere (no hidden fields!). The question is, how do i get the value of PERSONID directly from xml?

xfa.datasests.data ..... ????

Thanks!