xforms - Use read-only xf:input as xf:output in Orbeon? -

can use read-only xf:input act xf:output in orbeon? how set value of readonly input field?

simpler code sample:

<xf:input ref="//some/elements/totalcredit"           value="round(($quantity) * ($creditperunit))"> </xf:input >  <xf:output ref="//some/elements/totalcredit"             value="round(($quantity) * ($creditperunit))"/> 

in above code xf:input shows initial value model! doesn't update! xf:output value updated expected!

so, how can set xf:input's value xf:output?

• i don't want use calculation in bind.

in example, have xf:input both ref , value; not sure expect do, or if makes sense, sure won't work:

• with xf:output, can have both ref , value, node pointed ref can influence whether xf:output shown , value gives value.

• if want same xf:input, can put result of calculation in ref (in case round(($quantity) * ($creditperunit))). if expression returns atomic value, input field readonly, think should take care of situation.