[PATCH] parse-datetime: document the newly accepted format

[Jim Meyering]

J.T. Conklin sent the following to me privately and I made some
tiny adjustment.  Any comments before I push it?
We both admit that it's not complete, but trying to describe
in text what the grammar does is a losing game.
Suggestions for improvements are most welcome.


>From 617d664ec6befeccc6a0332d9aba6065076b3ff2 Mon Sep 17 00:00:00 2001
From: "J.T. Conklin" <address@hidden>
Date: Sun, 4 Sep 2011 23:11:23 +0200
Subject: [PATCH] parse-datetime: document the newly accepted format

* doc/parse-datetime.texi (Combined date and time of day items):
New section.
---
 ChangeLog               |    6 ++++++
 doc/parse-datetime.texi |   24 ++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 176aff9..2f64d74 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-09-04  J.T. Conklin  <address@hidden>
+
+       parse-datetime: document the newly accepted format
+       * doc/parse-datetime.texi (Combined date and time of day items):
+       New section.
+
 2011-09-06  Bruno Haible  <address@hidden>

        acl: Fix a test failure on newer Solaris 10 with ZFS.
diff --git a/doc/parse-datetime.texi b/doc/parse-datetime.texi
index b159f96..1e52f0d 100644
--- a/doc/parse-datetime.texi
+++ b/doc/parse-datetime.texi
@@ -51,6 +51,7 @@ Date input formats
 * Calendar date items::            19 Dec 1994.
 * Time of day items::              9:20pm.
 * Time zone items::                @sc{est}, @sc{pdt}, @sc{gmt}.
+* Combined date and time of day items:: 1972-09-24T20:02:00,000000-0500
 * Day of week items::              Monday and others.
 * Relative items in date strings:: next tuesday, 2 years ago.
 * Pure numbers in date strings::   19931219, 1440.
@@ -76,6 +77,7 @@ General date syntax
 @item calendar date items
 @item time of day items
 @item time zone items
address@hidden combined date and time of day items
 @item day of the week items
 @item relative items
 @item pure numbers.
@@ -311,6 +313,28 @@ Time zone items
 (@pxref{Specifying time zone rules}).


address@hidden Combined date and time of day items
address@hidden Combined date and time of day items
+
address@hidden combined date and time of day item
+
+A @dfn{combined date and time of day item} specifies the time on a
+specific day of the year.  This type is needed for formats that cannot
+be represented by individual calendar date (@pxref{Calendar date items})
+and time of day (@pxref{Time of day items}) items due to ambiguity.
+
address@hidden
+1972-09-24T20:02:00,000000-0500 # @sc{iso} 8601 extended date and time of day 
format
address@hidden example
+
address@hidden @sc{iso} 8601 date and time of day format
address@hidden date and time of day format, @sc{iso} 8601
+
+The @sc{iso} 8601 extended date and time of day format is an @sc{iso}
+8601 date, a @samp{T} character separator, followed by an @sc{iso} 8601 time
+of day.
+
+
 @node Day of week items
 @section Day of week items

--
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