def blob(self, nodeid, tag, start=0, end=0xFFFFFFFF):
        """
        Blobs are stored in sequential nodes
        with increasing index values.

        most blobs, like scripts start at index
        0, long names start at a specified
        offset.

        """
        startkey = self.makekey(nodeid, tag, start)
        endkey = self.makekey(nodeid, tag, end)
        cur = self.btree.find('ge', startkey)
        data = b''
        while cur.getkey() <= endkey:
            data += cur.getval()
            cur.next()
        return data
Blobs are stored in sequential nodes
        with increasing index values.

        most blobs, like scripts start at index
        0, long names start at a specified
        offset.