XForms

la nuova generazione delle form, più standard e flessibile, con XML,
separano i dati dalla presentazione e possono eseguire calcoli e validazioni.
Sono raccomandazioni W3C e saranno lo standard in XHTML 2.0

I dati in ingresso sono descritti in due parti: modello e interfaccia.

modello

descrive i dati con XML

<model>
<instance>
  <person>
    <fname/>
    <lname/>
  </person>
</instance>
<submission id="form1" action="submit.asp" method="get"/>
</model>

Dopo la raccolta dei dati, il documento sarà così:

<person>
  <fname>John</fname>
  <lname>Smith</lname>
</person>

oppure così:

fname=John;lname=Smith

user interface

visualizza e raccoglie i dati:

<input ref="fname"><label>First Name</label></input>
<input ref="lname"><label>Last Name</label></input>
<submit submission="form1"><label>Submit</label></submit>

insieme

i blocchi precedeti (modello e user interface) vanno messi insieme sequenzialmente e incapsulati:

<xforms>
...
</xforms>

i controlli

<input ref="name/fname"><label>First Name</label></input>
<secret ref="name/password"><label>Password:</label></secret>
<textarea ref="message"><label>Message</label></textarea>
<submit submission="form1"><label>Submit</label></submit>
<trigger ref="calculate"><label>Calculate!</label></trigger>

First Name: <output ref="name/fname" />

<upload bind="name"> <label>File to upload:</label> <filename bind="file"/> <mediatype bind="media"/> </upload>

select

<select1 ref="status"> 
  <label>Status:</label> 
  <item><label>Male</label><value>M</value></item> 
  <item><label>Female</label><value>F</value></item> 
</select1> 

<select ref="languages">
  <label>Languages:</label>
  <item><label>English</label><value>E</value></item>
  <item><label>French</label><value>F</value></item>
  <item><label>Spanish</label><value>S</value></item>
</select>

<range ref="length" start="0" end="100" step="5">
  <label>Length: </label>
</range>

data types di XML Schema

<shtml xmlns:xf="http://www.w3.org/2002/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

nuovi data types

<xf:instance>
<person xmlns="">
  <fname xsi:type="xsd:string"/>
  <lname xsi:type="xsd:string"/>
  <born xsi:type="xsd:date>"/>
  <size xsi:type="xsd:integer"/>
</person>
</xf:instance>

<xf:bind nodeset="/person/size" type="xsd:integer"/>

proprietà

calculate, constrains, p3ptype, readonly, relevant. required, type

<bind nodeset="person/lname" required="true()"/>

azioni

message, DomFocusing, ephemeral, setvalue

<message level="ephemeral" event="DOMFocusIn">
Input Your First Name
</message>

<setvalue value="50" event="xforms-ready"/>

funzioni

il tutorial W3Schools
il reference W3Schools