IDataCursor idc = pipeline.getCursor();
IData doc = IDataFactory.create();

if (idc.first("document")) {
	doc = IDataUtil.getIData(idc,"document");
} else {
	throw new ServiceException("Parameter 'document' is required");
}

//get a cursor for the "document" IData
IDataCursor idcDoc = doc.getCursor();
//position the cursor to the first entry in the document.  This should be another IData
idcDoc.first();
//get the name of the key of the first entry in the "document" IData
String docName = idcDoc.getKey();

//rename document removing prefix, if present.  Changes the name of the child document in place.
if (docName.indexOf(":") > 0)  {
	idcDoc.setKey(docName.substring(docName.indexOf(":") + 1));
}

idc.destroy();