why no doc type declaration and PIs in SOAP?

From: Jacek Kopecky <jacek@idoox.com> Date: Thu, 20 Sep 2001 17:38:36 +0200 (CEST) To: <xml-dist-app@w3.org> Message-ID: <Pine.LNX.4.33.0109201712150.29512-100000@mail.idoox.com> · This archive was generated by hypermail 2.2.0+W3C-0.50 : Thursday, 12 October 2006 00:08:42 GMT

 Hello all. 8-)
 I couldn't find it in archives (because the search engine
returned nothing at all), so I'll ask:
 What are the reasons for disallowing document type declaration
and processing instructions in SOAP? Will we keep the
restrictions in SOAP version 1.2? As it is now, SOAP grammar is a
subset of XML.
 Take care,

                            Jacek Kopecky

                            Idoox
                            http://www.idoox.com/