From: Justin Bailey <jgbailey@...>
Date: 2006-02-24T02:48:03+09:00
Subject: Re: Creating Ruby Classes from XSD?

------=_Part_9371_3762546.1140716866738
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline

Well, what it really makes easy is the import of a given XML document into
code. In .NET land, the XSD describes the format for a set of XML documents=
.
The class generated is then used to import those XML documents into a
structure that it's to work with in code than the raw DOM would be.

On 2/23/06, Logan Capaldo <logancapaldo@gmail.com> wrote:
>
>
> On Feb 23, 2006, at 12:12 PM, Justin Bailey wrote:
>
> > .NET ships with a tool that will generate classes directly from an XML
> > schema (XSD) file. Does the Ruby standard library have anything
> > similar?
> > It's a great tool on the .NET side, and I bet Ruby could do it even
> > better,
> > if not.
>
> Ok, I'm going to be honest and say first I've never had occasion to
> use this tool. But I'm wondering what exactly is the point? Ruby's
> syntax is much less verbose than XML.
> Why would you want to type  this:
>
> <?xml version=3D"1.0" encoding=3D"ISO-8859-1" ?>
> <xs:schema xmlns:xs=3D"http://www.w3.org/2001/XMLSchema">
> <xs:element name=3D"shiporder">
>   <xs:complexType>
>    <xs:sequence>
>     <xs:element name=3D"orderperson" type=3D"xs:string"/>
>     <xs:element name=3D"shipto">
>      <xs:complexType>
>       <xs:sequence>
>        <xs:element name=3D"name" type=3D"xs:string"/>
>        <xs:element name=3D"address" type=3D"xs:string"/>
>        <xs:element name=3D"city" type=3D"xs:string"/>
>        <xs:element name=3D"country" type=3D"xs:string"/>
>       </xs:sequence>
>      </xs:complexType>
>     </xs:element>
>     <xs:element name=3D"item" maxOccurs=3D"unbounded">
>      <xs:complexType>
>       <xs:sequence>
>        <xs:element name=3D"title" type=3D"xs:string"/>
>        <xs:element name=3D"note" type=3D"xs:string" minOccurs=3D"0"/>
>        <xs:element name=3D"quantity" type=3D"xs:positiveInteger"/>
>        <xs:element name=3D"price" type=3D"xs:decimal"/>
>       </xs:sequence>
>      </xs:complexType>
>     </xs:element>
>    </xs:sequence>
>    <xs:attribute name=3D"orderid" type=3D"xs:string" use=3D"required"/>
>   </xs:complexType>
> </xs:element>
> </xs:schema>
>
> When you can do one of these:
> class Shipto < Struct.new(:name, :address, :city, :country)
> end
>
> class Item < Struct.new(:orderid, :title, :note, :quantity, :price)
> end
>
> class  Shipment < Struct.new(:shipto, :item)
> end
>
> shipments =3D  []
>
> I may have mangled some of the XSD, I'm admitedly not familiar with
> it, but generating classes froma  schema seems rife with problems
>
>
>
>

------=_Part_9371_3762546.1140716866738--