Is there a standard or guide for creating XML files?

Question

I am curious if there is a standard or guideline for determining what types of things should be attributes and elements in an XML file.

I am also wondering how to create xmlarray and xmlarrayitem lists using XMLSerializer. For example, if I have the following:

<SomeBaseTag>
   <Item1 Attr11="one" Attr12="two" />
   <Item1 Attr11="one" Attr12="two" />
   <Item1 Attr11="one" Attr12="two" />
   <Item2 Attr21="one" Attr22="two" />
   <Item2 Attr21="one" Attr22="two" />
   <Item2 Attr21="one" Attr22="two" />
</SomeBaseTag>

Should I change it to:

<SomeBaseTag>
  <Item1s>
     <Item1 Attr11="one" Attr12="two" />
     <Item1 Attr11="one" Attr12="two" />
     <Item1 Attr11="one" Attr12="two" />
  </Item1s>
  <Item2s>
     <Item2 Attr21="one" Attr22="two" />
     <Item2 Attr21="one" Attr22="two" />
     <Item2 Attr21="one" Attr22="two" />
  </Item2s>
</SomeBaseTag>

Answer 1

It all depends on the semantics of what you are trying to represent using your XML document.

For example, if your represents a market stall and represents apples, but represents oranges, then the first format is ideal. SomeBaseTag Item1 Item2

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Answer 2

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<wsdl>
    <types/>

    <message/>
    <message/>
    <message/>

    <portTypes/>
    <bindings/>
    <service/>
</wsdl>

, <messages/>.

Answer 3

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Answer 4

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<SomeBaseTag>
    <SomeItemTag>
        <SomeAttributeTag>one</SomeAttributeTag>
        <AnotherAttributeTag>two</AnotherAttributeTag>
    </SomeItemTag>
    <SomeItemTag>
        <SomeAttributeTag>one</SomeAttributeTag>
        <AnotherAttributeTag>two</AnotherAttributeTag>
    </SomeItemTag>
</SomeBaseTag>

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Answer 5

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1:

<SomeBaseTag>   
    <Item1/>
    <Item1/>
    <Item2/>

2:

<SomeBaseTag>   
    <Set1>
      <Item1/>
      <Item1/>
    </Set1>
    <Set2>
        <Item2/>
    </Set2>

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. , . . WSDL .

WSDL:

<wsdl>
    <types/>

    <message/>
    <message/>
    <message/>

    <portTypes/>
    <bindings/>
    <service/>
</wsdl>

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<wsdl>
    <schema/>        
    <schema/>        
    <schema/>        
    <message/>
    <message/>
    <message/>

    <operation/>
    <operation/>
    <operation/>
    <binding/>
    <binding/>
    <binding/>
    <service/>
</wsdl>

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Answer 6

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EDIT: ,

SomeBaseTag:
    Item1s:
        - {Attr11: one, Attr12: two}
        - {Attr11: one, Attr12: two}
    Item2s:
        - {Attr21: one, Attr22: two}
        - {Attr21: one, Attr22: two}

Answer 7

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Answer 8

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