I'd like to propose some change to this. Firstly I find the current descriptions of the various valItems a bit cumbersome and non-idiomatic. e.g. "identifies a/the sending action of the message" The use of "a/the" for "a or the" is not something we do elsewhere, nor do I think it necessary here. It's not obvious what "the sending action of the message" means either -- the message is not carrying out the sending! The description should explain what this value of the @type attribute implies, and therefore in what circumstances it should be chosen. I suggest something like "information concerning the creation or authorship of a message". I'd prefer to see the suggested values as nouns rather than gerunds, as elsewhere. So "despatch" rather than "sending", "receipt" rather than "receiving". (But I appreciate that this may cause some upsets in existing data) I would like to see a suggestion for the "authoring" correspAction, since the text does talk about this (when introducing use of @sameAs) The distinction between "receiving" and "transmitting" needs to be clarified. I would say the same for the distinction between "redirecting" and "forwarding", except that I am not sure that I know what the distinction is in that case. So, my revised valList for correspAction/@type looks like this: <valList type="semi" mode="add"> <valItem ident="creation"> <desc versionDate="2015-02-09" xml:lang="en"> information concerning the creation or authorship of a message</desc> </valItem> <valItem ident="despatch"><!-- was sending --> <desc versionDate="2015-02-09" xml:lang="en"> information concerning the sending or despatch of a message</desc> </valItem> <valItem ident="receipt"><!-- was receiving --> <desc versionDate="2015-02-09" xml:lang="en"> information concerning the receipt of a message</desc> </valItem> <valItem ident="transmission"> <!-- was transmitting --> <desc versionDate="2015-02-09" xml:lang="en"> information concerning the transmission of a message after it has been despatched</desc> </valItem> <valItem ident="redirection"> <!-- was redirecting --> <desc versionDate="2015-02-09" xml:lang="en"> information concerning the redirection or forwarding of a message </desc> </valItem> </valList>