XI Mapping - understanding contexts

Question

Hello,
I have a PO idoc that I am trying to map from R/3 to a proxy in SUS (Supplier Self Services).  I need to allow each line item to have a "ship from location" address. 
The Idoc structure looks like this: ZORDERS1.IDOC.E1EDP01.Z1EDPA1.PARVW = "ZS",
E1EDP01 is repeated for each line item.  If PARVW within Z1EDPA1 = "ZS" then there is a "ship from location" assigned.
My test PO has 3 line items and line items 1 and 3 have "Ship From locations" assigned.  When I map the ship from locations the first line item has the ship from location data, the second shows "Ship From Location" but it shows no data, the third line item  doesn't even show the text "Ship From Location".
I believe this has to be a context issue but I don't understand how it should be set up.
Any ideas?
Thanks,
Matt

Answer 1

IDOC structure (simplified):
<ZORDERS1>
   <MANDT>050</MANDT>
   <DOCNUM>0000000057208371</DOCNUM>
   <E1EDK01>
        <CURCY>USD</CURCY>
        <WKURS>1.00000</WKURS>
   </E1EDK01>
   <E1EDP01>
        <POSEX>00001</POSEX>
        <ACTION>001</ACTION>
        <PSTYP>0</PSTYP>
        <MENGE>50.000</MENGE>
        <MENEE>PC</MENEE>
        <Z1EDPA1>
              <PARVW>ZS</PARVW>
              <LIFNR>0004000073</LIFNR>
              <NAME1>ZEICHMAN MANUFACTURING INC.</NAME1>
              <STRAS>5985 CLAY AVENUE SW</STRAS>
              <ORT01>Grand Rapids</ORT01>
              <PSTLZ>49548</PSTLZ>
              <LAND1>US</LAND1>
              <REGIO>MI</REGIO>
        </Z1EDPA1>
   </E1EDP01>
   <E1EDP01>
        <POSEX>00002</POSEX>
        <ACTION>001</ACTION>
        <PSTYP>0</PSTYP>
        <MENGE>40.000</MENGE>
        <MENEE>PC</MENEE>
        <Z1EDPA1></Z1EDPA1>
   </E1EDP01>
   <E1EDP01>
        <POSEX>00003</POSEX>
        <ACTION>001</ACTION>
        <PSTYP>0</PSTYP>
        <MENGE>90.000</MENGE>
        <MENEE>PC</MENEE>
        <Z1EDPA1>
              <PARVW>ZS</PARVW>
              <LIFNR>0004000073</LIFNR>
              <NAME1>ZEICHMAN MANUFACTURING INC.</NAME1>
              <STRAS>5985 CLAY AVENUE SW</STRAS>
              <ORT01>Grand Rapids</ORT01>
              <PSTLZ>49548</PSTLZ>
              <LAND1>US</LAND1>
              <REGIO>MI</REGIO>
        </Z1EDPA1>
   </E1EDP01>
</ZORDERS1>
XML Structure for SUS (simplified):
<PurchaseOrderRequest>
   <PurchaseOrder>
      <documentnumber></documentnumber>
      <item>
          <ShipFromLocation>
               <name></name>
               <street></street>
               <city></city>
               <state></state>
               <zip></zip>
           </ShipfromLocation>
        </item>
    </PurchaseOrder>
</PurchaseOrderRequest>
Does that help?
Thanks,
Matt