Updating attribute value using LLWS 971

Sander_Hofman_(shofman@opentext.com_(Delete)_24724

Hi,Using LL webservices to try to update an attribute value of a document. The only thing I can update is the description field, which I don't know what it is used for.When I debug the code I am able to modify the value of the attribute in Visual Studio and update the node. The modification is saved in LL. But there should be a method for this, but which one is it?I am using the following code: //Get the document node DocumentManagement.Node doc = docman.GetNode(otAuth, 6731); //Get the metadata DocumentManagement.Metadata md = doc.Metadata; //Get the 1st category DocumentManagement.AttributeGroup ag = md.AttributeGroups[0]; //Get the 1st attval DocumentManagement.DataValue attval = new DocumentManagement.DataValue(); attval = ag.Values[0]; attval.Description="t789"; //update the att value doc.Metadata = md; docman.UpdateNode(otAuth, doc);