aexp.visit(eser.serializer);
out.end("content");
LLTableCalculator.calc( aexp, rules, grammar.getPool(),this ).write(out,this);
out.end("attributeSymbol");
} else {
// other normal particles.
out.start("particle",new String[]{"id","o"+n});
exp.visit(eser.serializer);
out.end("particle");