Need help with SOAP Request/Response

I have never used SOAP before (please keep hygiene jokes to a minimum :) ) I have some API documentation of a product that uses the SOAP protocol to interface with an application server.

I have put together a simple xml code snippet and am trying to launch it from within my xml editor. Can I simply test the code by executing it from within my xml editor OR does the code have to be called from java or something else?

<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">

-<soap:Body>
-<IsAvailable xmlns="http://xxxxxxxxx">

        <tag1>val1</tag1>

        <tag2>val2</tag2>

</IsAvailable>
</soap:Body>
</soap:Envelope>

The above Method 'IsAvailable' should return a simple true or false based on the validation of the values of tag1 and tag2 at the nameservice location.

How can I simply test this xml code?

Thanks in advance for your help.