Re: Do you recognise this schema?

From:
Owen Jacobson <angrybaldguy@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Wed, 26 Mar 2008 18:52:41 -0700 (PDT)
Message-ID:
<299de3e1-1080-4ba9-93e8-b460dccea811@d21g2000prf.googlegroups.com>
On Mar 26, 7:53 pm, Roedy Green <see_webs...@mindprod.com.invalid>
wrote:

Here is a schema generated from the DTD for JNLP 6.

It looks similar to XSD, but not quite. What is it?

<?xml version="1.0" encoding="UTF-8" ?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

<!-- Schema for a JNLP 6.0 -->

  <xs:element name="all-permissions" type="xs:string" />

  <xs:element name="applet-desc">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="param" minOccurs="0" maxOccurs="unb=

ounded" />

      </xs:sequence>
      <xs:attribute name="height" type="xs:string" use="requir=

ed" />

      <xs:attribute name="name" type="xs:string" use="required=

" />

      <xs:attribute name="main-class" type="xs:string" use="re=

quired"

/>
      <xs:attribute name="width" type="xs:string" use="require=

d" />

      <xs:attribute name="documentbase" type="xs:string"
use="optional" />
    </xs:complexType>
  </xs:element>

  <xs:element name="application-desc">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="argument" minOccurs="0" maxOccurs="=

unbounded"

/>
      </xs:sequence>
      <xs:attribute name="main-class" type="xs:string" use="op=

tional"

/>
    </xs:complexType>
  </xs:element>

  <xs:element name="argument">
    <xs:complexType mixed="true" />
  </xs:element>

  <xs:element name="association">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="description" minOccurs="0" />
        <xs:element ref="icon" minOccurs="0" />
      </xs:sequence>
      <xs:attribute name="extensions" type="xs:string" use="re=

quired"

/>
      <xs:attribute name="mime-type" type="xs:string" use="req=

uired"

/>
    </xs:complexType>
  </xs:element>

  <xs:element name="component-desc" type="xs:string" />

  <xs:element name="description">
    <xs:complexType mixed="true">
      <xs:attribute name="kind" use="optional">
        <xs:simpleType>
          <xs:restriction base="xs:NMTOKEN">
            <xs:enumeration value="one-line" />
            <xs:enumeration value="short" />
            <xs:enumeration value="tooltip" />
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
    </xs:complexType>
  </xs:element>

  <xs:element name="desktop" type="xs:string" />

  <xs:element name="ext-download">
    <xs:complexType>
      <xs:attribute name="download" use="optional" default="ea=

ger">

        <xs:simpleType>
          <xs:restriction base="xs:NMTOKEN">
            <xs:enumeration value="lazy" />
            <xs:enumeration value="eager" />
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
      <xs:attribute name="part" type="xs:string" use="optional=

" />

      <xs:attribute name="ext-part" type="xs:string" use="requ=

ired" />

    </xs:complexType>
  </xs:element>

  <xs:element name="extension">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="ext-download" minOccurs="0"
maxOccurs="unbounded" />
      </xs:sequence>
      <xs:attribute name="version" type="xs:string" use="optio=

nal" />

      <xs:attribute name="href" type="xs:string" use="required=

" />

      <xs:attribute name="name" type="xs:string" use="optional=

" />

    </xs:complexType>
  </xs:element>

  <xs:element name="homepage">
    <xs:complexType>
      <xs:attribute name="href" type="xs:string" use="required=

" />

    </xs:complexType>
  </xs:element>

  <xs:element name="icon">
    <xs:complexType>
      <xs:attribute name="height" type="xs:string" use="option=

al" />

      <xs:attribute name="version" type="xs:string" use="optio=

nal" />

      <xs:attribute name="href" type="xs:string" use="required=

" />

      <xs:attribute name="size" type="xs:string" use="optional=

" />

      <xs:attribute name="kind" type="xs:string" use="optional=

" />

      <xs:attribute name="width" type="xs:string" use="optiona=

l" />

      <xs:attribute name="depth" type="xs:string" use="optiona=

l" />

    </xs:complexType>
  </xs:element>

  <xs:element name="information">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="title" />
        <xs:element ref="vendor" />
        <xs:element ref="homepage" minOccurs="0" />
        <xs:element ref="description" minOccurs="0"
maxOccurs="unbounded" />
        <xs:element ref="icon" minOccurs="0" maxOccurs="unbo=

unded" />

        <xs:element ref="offline-allowed" minOccurs="0" />
        <xs:element ref="shortcut" minOccurs="0" />
        <xs:element ref="association" minOccurs="0" />
        <xs:element ref="related-content" minOccurs="0"
maxOccurs="unbounded" />
      </xs:sequence>
      <xs:attribute name="locale" type="xs:string" use="option=

al" />

      <xs:attribute name="platform" type="xs:string" use="opti=

onal" />

      <xs:attribute name="arch" type="xs:string" use="optional=

" />

      <xs:attribute name="os" type="xs:string" use="optional" =

/>

    </xs:complexType>
  </xs:element>

  <xs:element name="installer-desc">
    <xs:complexType>
      <xs:attribute name="main-class" type="xs:string" use="op=

tional"

/>
    </xs:complexType>
  </xs:element>

  <xs:element name="j2ee-application-client-permissions"
type="xs:string" />

  <xs:element name="j2se">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="resources" minOccurs="0"
maxOccurs="unbounded" />
      </xs:sequence>
      <xs:attribute name="version" type="xs:string" use="requi=

red" />

      <xs:attribute name="href" type="xs:string" use="optional=

" />

      <xs:attribute name="max-heap-size" type="xs:string"
use="optional" />
      <xs:attribute name="java-vm-args" type="xs:string"
use="optional" />
      <xs:attribute name="initial-heap-size" type="xs:string"
use="optional" />
    </xs:complexType>
  </xs:element>

  <xs:element name="jar">
    <xs:complexType>
      <xs:attribute name="main" use="optional" default="false"=

        <xs:simpleType>
          <xs:restriction base="xs:NMTOKEN">
            <xs:enumeration value="true" />
            <xs:enumeration value="false" />
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
      <xs:attribute name="download" use="optional" default="ea=

ger">

        <xs:simpleType>
          <xs:restriction base="xs:NMTOKEN">
            <xs:enumeration value="eager" />
            <xs:enumeration value="lazy" />
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
      <xs:attribute name="version" type="xs:string" use="optio=

nal" />

      <xs:attribute name="href" type="xs:string" use="required=

" />

      <xs:attribute name="part" type="xs:string" use="optional=

" />

      <xs:attribute name="size" type="xs:string" use="optional=

" />

    </xs:complexType>
  </xs:element>

  <xs:element name="java">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="resources" minOccurs="0"
maxOccurs="unbounded" />
      </xs:sequence>
      <xs:attribute name="version" type="xs:string" use="requi=

red" />

      <xs:attribute name="href" type="xs:string" use="optional=

" />

      <xs:attribute name="max-heap-size" type="xs:string"
use="optional" />
      <xs:attribute name="java-vm-args" type="xs:string"
use="optional" />
      <xs:attribute name="initial-heap-size" type="xs:string"
use="optional" />
    </xs:complexType>
  </xs:element>

  <xs:element name="jnlp">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="information" maxOccurs="unbounded" />=

        <xs:element ref="security" minOccurs="0" />
        <xs:element ref="update" minOccurs="0" />
        <xs:element ref="resources" minOccurs="0"
maxOccurs="unbounded" />
        <xs:choice>
          <xs:element ref="application-desc" />
          <xs:element ref="applet-desc" />
          <xs:element ref="component-desc" />
          <xs:element ref="installer-desc" />
        </xs:choice>
      </xs:sequence>
      <xs:attribute name="version" type="xs:string" use="optio=

nal" />

      <xs:attribute name="href" type="xs:string" use="optional=

" />

      <xs:attribute name="spec" type="xs:string" use="optional=

" />

      <xs:attribute name="codebase" type="xs:string" use="opti=

onal" />

    </xs:complexType>
  </xs:element>

  <xs:element name="menu">
    <xs:complexType>
      <xs:attribute name="submenu" type="xs:string" use="optio=

nal" />

    </xs:complexType>
  </xs:element>

  <xs:element name="nativelib">
    <xs:complexType>
      <xs:attribute name="download" use="optional" default="ea=

ger">

        <xs:simpleType>
          <xs:restriction base="xs:NMTOKEN">
            <xs:enumeration value="eager" />
            <xs:enumeration value="lazy" />
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
      <xs:attribute name="version" type="xs:string" use="optio=

nal" />

      <xs:attribute name="href" type="xs:string" use="required=

" />

      <xs:attribute name="part" type="xs:string" use="optional=

" />

      <xs:attribute name="size" type="xs:string" use="optional=

" />

    </xs:complexType>
  </xs:element>

  <xs:element name="offline-allowed" type="xs:string" />

  <xs:element name="package">
    <xs:complexType>
      <xs:attribute name="recursive" use="optional" default="f=

alse">

        <xs:simpleType>
          <xs:restriction base="xs:NMTOKEN">
            <xs:enumeration value="true" />
            <xs:enumeration value="false" />
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
      <xs:attribute name="part" type="xs:string" use="required=

" />

      <xs:attribute name="name" type="xs:string" use="required=

" />

    </xs:complexType>
  </xs:element>

  <xs:element name="param">
    <xs:complexType>
      <xs:attribute name="name" type="xs:string" use="required=

" />

      <xs:attribute name="value" type="xs:string" use="require=

d" />

    </xs:complexType>
  </xs:element>

  <xs:element name="property">
    <xs:complexType>
      <xs:attribute name="name" type="xs:string" use="required=

" />

      <xs:attribute name="value" type="xs:string" use="require=

d" />

    </xs:complexType>
  </xs:element>

  <xs:element name="related-content">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="title" minOccurs="0" />
        <xs:element ref="description" minOccurs="0" />...

read more =BB


It *is* XSD. However, the DTD->XSD translation has (sensibly enough)
translated all the <!ELEMENT DTD components into top-level <element>
components in the schema, resulting in a schema with many anonymous
complex types and many top-level elements, which is unusual (IME).

A more idiomatic translation would have many named complex types and
one or a very few top-level elements. This schema allows for, eg., a
document composed only of

<param name="x" value="y" />

to be valid.

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