CSOM speaks to SharePoint in WCF web service calls.

Here is an example of a SharePoint WCF web service XML request from SharePoint 2010:

<Request AddExpandoFieldTypeSuffix="true" SchemaVersion="" LibraryVersion=""
         ApplicationName=".NET Library" xmlns="http://schemas.microsoft.com/sharepoint/clientquery/2009">
        <ObjectPath Id="2" ObjectPathId="1"/>
        <ObjectPath Id="4" ObjectPathId="3"/>
        <ObjectPath Id="6" ObjectPathId="5"/>
        <ObjectPath Id="8" ObjectPathId="7"/>
        <ObjectPath Id="10" ObjectPathId="9"/>
        <Query Id="11" ObjectPathId="9">
            <Query SelectAllProperties="true">
            <ChildItemQuery SelectAllProperties="true">
        <StaticProperty Id="1" TypeId="{3747adcd-a3c3-41b9-bfab-4a64dd2f1e0a}" Name="Current"/>
        <Property Id="3" ParentId="1" Name="Site"/>
        <Property Id="5" ParentId="3" Name="RootWeb"/>
        <Property Id="7" ParentId="5" Name="SiteUserInfoList"/>
        <Method Id="9" ParentId="7" Name="GetItems">
                <Parameter TypeId="{3d248d7b-fc86-40a3-aa97-02a75d69fb8a}">
                    <Property Name="AllowIncrementalResults" Type="Boolean">false</Property>
                    <Property Name="DatesInUtc" Type="Boolean">true</Property>
                    <Property Name="FolderServerRelativePath" Type="Null"/>
                    <Property Name="FolderServerRelativeUrl" Type="Null"/>
                    <Property Name="ListItemCollectionPosition" Type="Null"/>
                    <Property Name="ViewXml" Type="String">&lt;View Scope="RecursiveAll"&gt;&lt;RowLimit&gt;5&lt;/RowLimit&gt;&lt;/View&gt;</Property>

Within this request there are TypeId elements like this:


These type ID represent Class names in the WCF class library. Is there a way to look these up by TypeId? Do they tend to change in between schema versions?

1 Answer 1


Linda Zhang technet forum moderator gave me this answer here


A TypeId is a GUID that identifies the Client-Side Object Model (CSOM) Object type.

The Name is the name of the static method/property to call or is used to access on the CSOM Object type that is specified by the TypeId attribute. It must be the name of a valid static method/property of the CSOM Object type.

The TypeId “3747adcd-a3c3-41b9-bfab-4a64dd2f1e0a” is the reference to “Microsoft.SharePoint.Client.RequestContext”. Use “Current” property to return the SPContext for the current HttpContext.

The TypeId “3d248d7b-fc86-40a3-aa97-02a75d69fb8a” is referencing “Microsoft.SharePoint.Client.CamlQuery”.

SharePoint CSOM Protocol:


Types, methods, and properties of the SharePoint CSOM API Protocol:


A PDF of SharePoint CSOM API Protocol information:


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.