comment on

Thank you for trying to help - I am still very new to XML::Twig and I am probably not doing things as efficiently as I could be. (Sorry for the typo with $xml in the above code - I fixed it.)

I'm trying to extract certain attributes from a small set of tags in the XML document referenced above. Specifically, the UML:Class tags contain UML:Attribute tags, and I want to extract the name and xmi.id attributes from them. The general structure of this portion of the document looks like this:

<UML:Class>
    <UML:Attribute></UML:Attribute>
    <UML:Attribute></UML:Attribute>
    <UML:Attribute></UML:Attribute>
</UML:Class>
[download]

A complete example is shown under the readmore.

    <UML:Class name="Gel2d" xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E61B
+46C6D92" visibility="public" namespace="EAPK_AEE09178_6653_49a3_91E8_
+7CD6004767CA" isRoot="false" isLeaf="false" isAbstract="false" isActi
+ve="false">
      <UML:GeneralizableElement.generalization xmi.id="EAID_6AF3DB85_3
+AFE_4843_B8D3_0E61B46C6D92_fix_0">
        <Foundation.Core.Generalization xmi.idref="EAID_8E74DB6E_6F4A_
+451b_A1E2_17F60ED264AE" xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E61B46C
+6D92_fix_0_fix_0" />
      </UML:GeneralizableElement.generalization>
      <UML:Classifier.feature xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E6
+1B46C6D92_fix_2">
        <UML:Attribute name="loading" changeable="none" visibility="pu
+blic" ownerScope="instance" targetScope="instance" xmi.id="EAID_6AF3D
+B85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_0">
          <UML:StructuralFeature.multiplicity xmi.id="EAID_6AF3DB85_3A
+FE_4843_B8D3_0E61B46C6D92_fix_2_fix_0_fix_0">
            <UML:Multiplicity xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E6
+1B46C6D92_fix_2_fix_0_fix_0_fix_0">
              <UML:Multiplicity.range xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_0_fix_0_fix_0_fix_0">
                <UML:MultiplicityRange lower="1" upper="1" xmi.id="EAI
+D_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_0_fix_0_fix_0_fix_0_
+fix_0" />
              </UML:Multiplicity.range>
            </UML:Multiplicity>
          </UML:StructuralFeature.multiplicity>
          <UML:Attribute.initialValue xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_0_fix_1">
            <UML:Expression xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E61B
+46C6D92_fix_2_fix_0_fix_1_fix_0" />
          </UML:Attribute.initialValue>
          <UML:StructuralFeature.type xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_0_fix_2">
            <Foundation.Core.Classifier xmi.idref="eaxmiid3" xmi.id="E
+AID_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_0_fix_2_fix_0" />
          </UML:StructuralFeature.type>
        </UML:Attribute>
        <UML:Attribute name="minPhRange" changeable="none" visibility=
+"public" ownerScope="instance" targetScope="instance" xmi.id="EAID_6A
+F3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_1">
          <UML:StructuralFeature.multiplicity xmi.id="EAID_6AF3DB85_3A
+FE_4843_B8D3_0E61B46C6D92_fix_2_fix_1_fix_0">
            <UML:Multiplicity xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E6
+1B46C6D92_fix_2_fix_1_fix_0_fix_0">
              <UML:Multiplicity.range xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_1_fix_0_fix_0_fix_0">
                <UML:MultiplicityRange lower="1" upper="1" xmi.id="EAI
+D_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_1_fix_0_fix_0_fix_0_
+fix_0" />
              </UML:Multiplicity.range>
            </UML:Multiplicity>
          </UML:StructuralFeature.multiplicity>
          <UML:Attribute.initialValue xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_1_fix_1">
            <UML:Expression xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E61B
+46C6D92_fix_2_fix_1_fix_1_fix_0" />
          </UML:Attribute.initialValue>
          <UML:StructuralFeature.type xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_1_fix_2">
            <Foundation.Core.Classifier xmi.idref="eaxmiid3" xmi.id="E
+AID_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_1_fix_2_fix_0" />
          </UML:StructuralFeature.type>
        </UML:Attribute>
        <UML:Attribute name="maxPhRange" changeable="none" visibility=
+"public" ownerScope="instance" targetScope="instance" xmi.id="EAID_6A
+F3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_2">
          <UML:StructuralFeature.multiplicity xmi.id="EAID_6AF3DB85_3A
+FE_4843_B8D3_0E61B46C6D92_fix_2_fix_2_fix_0">
            <UML:Multiplicity xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E6
+1B46C6D92_fix_2_fix_2_fix_0_fix_0">
              <UML:Multiplicity.range xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_2_fix_0_fix_0_fix_0">
                <UML:MultiplicityRange lower="1" upper="1" xmi.id="EAI
+D_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_2_fix_0_fix_0_fix_0_
+fix_0" />
              </UML:Multiplicity.range>
            </UML:Multiplicity>
          </UML:StructuralFeature.multiplicity>
          <UML:Attribute.initialValue xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_2_fix_1">
            <UML:Expression xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E61B
+46C6D92_fix_2_fix_2_fix_1_fix_0" />
          </UML:Attribute.initialValue>
          <UML:StructuralFeature.type xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_2_fix_2">
            <Foundation.Core.Classifier xmi.idref="eaxmiid3" xmi.id="E
+AID_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_2_fix_2_fix_0" />
          </UML:StructuralFeature.type>
        </UML:Attribute>
        <UML:Attribute name="firstDimDate" changeable="none" visibilit
+y="public" ownerScope="instance" targetScope="instance" xmi.id="EAID_
+6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_3">
          <UML:StructuralFeature.multiplicity xmi.id="EAID_6AF3DB85_3A
+FE_4843_B8D3_0E61B46C6D92_fix_2_fix_3_fix_0">
            <UML:Multiplicity xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E6
+1B46C6D92_fix_2_fix_3_fix_0_fix_0">
              <UML:Multiplicity.range xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_3_fix_0_fix_0_fix_0">
                <UML:MultiplicityRange lower="1" upper="1" xmi.id="EAI
+D_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_3_fix_0_fix_0_fix_0_
+fix_0" />
              </UML:Multiplicity.range>
            </UML:Multiplicity>
          </UML:StructuralFeature.multiplicity>
          <UML:Attribute.initialValue xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_3_fix_1">
            <UML:Expression xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E61B
+46C6D92_fix_2_fix_3_fix_1_fix_0" />
          </UML:Attribute.initialValue>
          <UML:StructuralFeature.type xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_3_fix_2">
            <Foundation.Core.Classifier xmi.idref="eaxmiid4" xmi.id="E
+AID_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_3_fix_2_fix_0" />
          </UML:StructuralFeature.type>
        </UML:Attribute>
        <UML:Attribute name="secondDimDate" changeable="none" visibili
+ty="public" ownerScope="instance" targetScope="instance" xmi.id="EAID
+_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_4">
          <UML:StructuralFeature.multiplicity xmi.id="EAID_6AF3DB85_3A
+FE_4843_B8D3_0E61B46C6D92_fix_2_fix_4_fix_0">
            <UML:Multiplicity xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E6
+1B46C6D92_fix_2_fix_4_fix_0_fix_0">
              <UML:Multiplicity.range xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_4_fix_0_fix_0_fix_0">
                <UML:MultiplicityRange lower="1" upper="1" xmi.id="EAI
+D_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_4_fix_0_fix_0_fix_0_
+fix_0" />
              </UML:Multiplicity.range>
            </UML:Multiplicity>
          </UML:StructuralFeature.multiplicity>
          <UML:Attribute.initialValue xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_4_fix_1">
            <UML:Expression xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3_0E61B
+46C6D92_fix_2_fix_4_fix_1_fix_0" />
          </UML:Attribute.initialValue>
          <UML:StructuralFeature.type xmi.id="EAID_6AF3DB85_3AFE_4843_
+B8D3_0E61B46C6D92_fix_2_fix_4_fix_2">
            <Foundation.Core.Classifier xmi.idref="eaxmiid4" xmi.id="E
+AID_6AF3DB85_3AFE_4843_B8D3_0E61B46C6D92_fix_2_fix_4_fix_2_fix_0" />
          </UML:StructuralFeature.type>
        </UML:Attribute>
      </UML:Classifier.feature>
      <UML:Namespace.ownedElement xmi.id="EAID_6AF3DB85_3AFE_4843_B8D3
+_0E61B46C6D92_fix_3">
        <UML:Generalization child="EAID_6AF3DB85_3AFE_4843_B8D3_0E61B4
+6C6D92" parent="EAID_68C27150_2324_4f98_AECD_172A1251AB21" xmi.id="EA
+ID_8E74DB6E_6F4A_451b_A1E2_17F60ED264AE" visibility="public" />
      </UML:Namespace.ownedElement>
    </UML:Class>
[download]

If I understand how XML::Twig works, a section of the tree is sent to a handler when the closing tag is reached. Therefore, for the simplified example above, each of the UML:Attribute sections will get parsed before the corresponding UML:Class section is parsed. I would like to parse the Class first (so I don't have to jump through hoops to associate the Attribute data with the Class data later), which is why the handler for UML:Attribute is located in the handler for UML:Class.

I admit that it seems inefficient to call sprint and then parse. I took that snippet from GrandFather's example. Is there a better way to do it?

I hope that clarifies what I'm trying to do. I'd appreciate any suggestions that you might have. Thanks.

In reply to Re^4: Pulling out sections of an XMI file with XML::Twig by bobf
in thread Pulling out sections of an XMI file with XML::Twig by bobf

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