Hi Anders,
thank you for your question!
It is possible to send SOAP requests using RSD files, the REST connector is the right one for the job.
A basic example with could look something like this:
<api:script xmlns:api="http://apiscript.com/ns?v1" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<!-- See Column Definitions to specify column behavior and use XPaths to extract column values from XML. -->
<api:info title="2" desc="Generated schema file." xmlns:other="http://apiscript.com/ns?v1">
<!-- You can modify the name, type, and column size here. -->
<attr name="Field1" xs:type="string" readonly="false" other:xPath="/item/Field1" />
<attr name="Field2" xs:type="string" readonly="false" other:xPath="/item/Field2" />
<attr name="Field3" xs:type="string" readonly="false" other:xPath="/item/Field3" />
</api:info>
<api:set attr="DataModel" value="DOCUMENT" />
<api:set attr="PushAttributes" value="true" />
<api:set attr="EnablePaging" value="true" />
<api:set attr="Header:Name#" value="SOAPAction"/>
<api:set attr="URI" value="https://your.soap.endpoint.com/?wsdl" />
<api:set attr="XPath" value="/item" />
<api:set attr="method" value="POST"/>
<api:set attr="Header:Name" value="Content-Type" />
<api:set attr="Header:Value" value="text/xml" />
<api:set attr="data">
<?xml version="1.0" encoding="utf-8"?>
<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:uen="uen:esws">
<soapenv:Header/>
<soapenv:Body>
<uen:Esws.getUsers soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<p_companyID xsi:type="xsd:string">[_connection.Password]</p_companyID>
<p_page xsi:type="xsd:string"></p_page>
<p_locationID xsi:type="xsd:string">3</p_locationID>
<p_user_id xsi:type="xsd:string"></p_user_id>
</uen:Esws.getUsers>
</soapenv:Body>
</soapenv:Envelope>
</api:set>
<api:set attr="XPath" value="/Envelope/Body/" />
<!-- The GET method corresponds to SELECT. Here you can override the default processing of the SELECT statement. The results of processing are pushed to the schema's output. See SELECT Execution for more information. -->
<api:script method="GET">
<api:set attr="method" value="GET"/>
<api:call op="xmlproviderGet">
<api:push/>
</api:call>
</api:script>
</api:script>
Thomas has certainly more knowledge around this, but I think this should give you an idea.
/Frank