ok thx
problem solved :)
i read name/temat/predykat/object from TextField, validate it and when temat/obiekt be blank node i replace it for ?a/?c and it works :)
code below
  query= " WITH " + name+
                " DELETE " +
                " { "+
                    temat + " " + predykat + " " +obiekt+ " " +
                " } " +
                " WHERE " +
                " { "+
                    temat + " " + predykat + " " +obiekt+ " " +
                " } ";

--
Pozdrawiam
Wojciech Ciesielski

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