The source field is populated with the source of the given record. It can be added together with the request when creating or updating a record.
Any text value up to 50 characters in length can be entered here.
For example:
<winstrom version="1.0">
<faktura-vydana>
<typDokl>code:FAKTURA</typDokl>
<polozkyFaktury>
<faktura-vydana-polozka>
<kod>KOD1</kod>
<source>EXTERNI_APLIKACE_C.2</source>
</faktura-vydana-polozka>
</polozkyFaktury>
</faktura-vydana>
</winstrom>