Invalid Soap Call - soap

Question

Why doesn't this soap call work for this URL ?
http://services.aonaware.com/DictService/DictService.asmx?op=Define
<v:Envelope xmlns:i="http://www.w3.org/1999/XMLSchema-instance" xmlns:d="http://www.w3.org/1999/XMLSchema" xmlns:c="http://schemas.xmlsoap.org/soap/encoding/" xmlns:v="http://schemas.xmlsoap.org/soap/envelope/">
<v:Header />
<v:Body>
<Define xmlns="http://tempuri.org/" id="o0" c:root="1">
<word i:type="d:string">Name</word>
</Define>
</v:Body>
</v:Envelope>
But this one does
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:web="http://services.aonaware.com/webservices/">
<soapenv:Header/>
<soapenv:Body>
<web:Define>
<!--Optional:-->
<web:word>Test</web:word>
</web:Define>
</soapenv:Body>
</soapenv:Envelope>

Answer 1

Because they are different: not only in content but also in namespace definition, to correct the first one you've to atleast use the correct namespace so use http://services.aonaware.com/webservices/ for your <Define> element as you do in the second one:
<v:Envelope xmlns:i="http://www.w3.org/1999/XMLSchema-instance" xmlns:d="http://www.w3.org/1999/XMLSchema" xmlns:c="http://schemas.xmlsoap.org/soap/encoding/" xmlns:v="http://schemas.xmlsoap.org/soap/envelope/">
<v:Header />
<v:Body>
<Define xmlns="http://services.aonaware.com/webservices/" id="o0" c:root="1">
<word i:type="d:string">Name</word>
</Define>
</v:Body>
</v:Envelope>
Then make sure also that id an c:root are valid attributes in your xsd for <Definition> and i:type it's a correct one for <word>.
EDIT
I invoke http://services.aonaware.com/DictService/DictService.asmx with SOAPUI using my corrected request and it response correctly:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<DefineResponse xmlns="http://services.aonaware.com/webservices/">
<DefineResult>
<Word>Name</Word>
<Definitions>
<Definition>
<Word>Name</Word>
<Dictionary>
<Id>gcide</Id>
<Name>The Collaborative International Dictionary of English v.0.44</Name>
</Dictionary>
<WordDefinition>Name \Name\ (n[=a]m), n. [AS. nama; akin to D. naam, OS. & OHG.
...
[1913 Webster]</WordDefinition>
</Definition>
<Definition>
<Word>Name</Word>
<Dictionary>
<Id>gcide</Id>
<Name>The Collaborative International Dictionary of English v.0.44</Name>
</Dictionary>
<WordDefinition>Name \Name\ (n[=a]m), v. t. [imp. & p. p. {Named} (n[=a]md); p.
...
</WordDefinition>
</Definition>
</Definitions>
</DefineResult>
</DefineResponse>
</soap:Body>
</soap:Envelope>
Hope this helps,