Enable this property to look at the web.config file that manages the site for this web part’s properties. The supported web part property entries are shown below. "XMLAdapter" comes from the Web.Config Element To Use property.
<appSettings>
<add key="CorasWorksXMLAdapterUseWebConfigSettings" value="true" />
<add key="CorasWorksXMLAdapterConnectionIdentifier" value="Conn" />
<add key="CorasWorksXMLAdapterWebPartIDIdentifier" value="WID" />
<add key="CorasWorksXMLAdapterOverrideForcedOutputIdentifier" value="OFO" />
<add key="CorasWorksXMLAdapterCustomXMLIdentifier" value="CustXML" />
<add key="CorasWorksXMLAdapterDataOnlyIdentifier" value="DO" />
<add key="CorasWorksXMLAdapterFilterIdentifier" value="Filt" />
</appSettings>