usefor-usefor-02 November 2004

3.2.10  Xref

   The Xref header indicates where an article was filed by the last
   serving agent to process it.  The article locations are used to keep
   track of crossposted articles so that reading agents serviced by a
   particular serving agent can mark such articles as read.
   xref            =  "Xref:" SP [CFWS] server-name
            1*( CFWS location ) [CFWS] CRLF

   server-name     =  path-identity

   location        =  newsgroup-name ":" article-locator

   article-locator =  1*( %x21-27 / %x29-3A / %x3C-7E )
            ; US-ASCII printable characters
            ; except '(' and ';'

   The <server-name> is included so that software can determine which
   serving agent generated the header.  The locations specify what
   newsgroups the article was filed under (which may differ from those
   in the Newsgroups header) and where it was filed under them.  The
   exact form of an article-locator is implementation-specific.

      NOTE: The traditional form of an article-locator (as used by
      [NNTP]) is a decimal number, with articles in each newsgroup
      numbered consecutively starting from 1.

--- ../usefor-usefor-01/Xref.out          September 2004
+++ ../usefor-usefor-02/Xref.out          November 2004
@@ -1,8 +1,9 @@
 3.2.10  Xref
 
    The Xref header indicates where an article was filed by the last
-   serving agent to process it.
-
+   serving agent to process it.  The article locations are used to keep
+   track of crossposted articles so that reading agents serviced by a
+   particular serving agent can mark such articles as read.
    xref            =  "Xref:" SP [CFWS] server-name
             1*( CFWS location ) [CFWS] CRLF
 
@@ -14,13 +15,13 @@
             ; US-ASCII printable characters
             ; except '(' and ';'
 
-   The server-name is included so that software can determine which
+   The <server-name> is included so that software can determine which
    serving agent generated the header.  The locations specify what
    newsgroups the article was filed under (which may differ from those
-   in the Newsgroups-header) and where it was filed under them.  The
+   in the Newsgroups header) and where it was filed under them.  The
    exact form of an article-locator is implementation-specific.
 
-   NOTE: The traditional form of an article-locator (as used by NNTP) is
-   a decimal number, with articles in each newsgroup numbered
-   consecutively starting from 1.
+      NOTE: The traditional form of an article-locator (as used by
+      [NNTP]) is a decimal number, with articles in each newsgroup
+      numbered consecutively starting from 1.