Return-Path: 
 <any23-user-return-26-apmail-incubator-any23-user-archive=incubator.apache.org@incubator.apache.org>
X-Original-To: apmail-incubator-any23-user-archive@minotaur.apache.org
Delivered-To: apmail-incubator-any23-user-archive@minotaur.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id 508ACC749
	for <apmail-incubator-any23-user-archive@minotaur.apache.org>;
 Mon, 30 Apr 2012 11:17:09 +0000 (UTC)
Received: (qmail 20974 invoked by uid 500); 30 Apr 2012 11:17:09 -0000
Delivered-To: apmail-incubator-any23-user-archive@incubator.apache.org
Received: (qmail 20891 invoked by uid 500); 30 Apr 2012 11:17:07 -0000
Mailing-List: contact any23-user-help@incubator.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:any23-user-help@incubator.apache.org>
List-Unsubscribe: <mailto:any23-user-unsubscribe@incubator.apache.org>
List-Post: <mailto:any23-user@incubator.apache.org>
List-Id: <any23-user.incubator.apache.org>
Reply-To: any23-user@incubator.apache.org
Delivered-To: mailing list any23-user@incubator.apache.org
Received: (qmail 20865 invoked by uid 99); 30 Apr 2012 11:17:06 -0000
Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 30 Apr 2012 11:17:06 +0000
X-ASF-Spam-Status: No, hits=2.6 required=5.0
	tests=HTML_MESSAGE,NO_RDNS_DOTCOM_HELO,RCVD_IN_DNSWL_LOW,SPF_NEUTRAL
X-Spam-Check-By: apache.org
Received-SPF: neutral (nike.apache.org: 216.145.54.172 is neither permitted
 nor denied by domain of tep@yahoo-inc.com)
Received: from [216.145.54.172] (HELO mrout2.yahoo.com) (216.145.54.172)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 30 Apr 2012 11:16:57 +0000
Received: from IRD-EX07CAS01.ds.corp.yahoo.com
 (ird-ex07cas01.corp.ird.yahoo.com [77.238.176.71])
	by mrout2.yahoo.com (8.14.4/8.14.4/y.out) with ESMTP id q3UBFQ62087105
	for <any23-user@incubator.apache.org>; Mon, 30 Apr 2012 04:16:18 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yahoo-inc.com;
	s=cobra; t=1335784578;
	bh=qLbvZ0Jki3kDgkvyIE1Tr4du+2BmNDmDLI5eJGSPj1k=;
	h=From:To:Date:Subject:Message-ID:Content-Type:MIME-Version;
	b=a035RVG+HikaotzMwftfafRNMvGW1t7+hsZRXbX+ZWnE9mo6fuXLC1DLvPEV/pzab
	 gIuSVCY4AXjvgG3GMyCBTrthIE8XX+CNQD1fVBaLghOTf62S7FJeVOmg0orPzF0lK4
	 ho6dYMwJoi64Clx0BOl12/i6brICO+c7+HeldKqI=
Received: from IRD-EX07VS01.ds.corp.yahoo.com ([77.238.176.68]) by
 IRD-EX07CAS01.ds.corp.yahoo.com ([77.238.176.79]) with mapi; Mon, 30 Apr 2012
 12:16:00 +0100
From: Tim Potter <tep@yahoo-inc.com>
To: "any23-user@incubator.apache.org" <any23-user@incubator.apache.org>
Date: Mon, 30 Apr 2012 12:15:59 +0100
Subject: Mircodata empty content handling.
Thread-Topic: Mircodata empty content handling.
Thread-Index: Ac0mwp8lOs/qFcqHQtaNrb756bEyvg==
Message-ID: <CBC4410F.4651%tep@yahoo-inc.com>
Accept-Language: es-ES, en-US
Content-Language: en-US
X-MS-Has-Attach: 
X-MS-TNEF-Correlator: 
user-agent: Microsoft-MacOutlook/14.2.1.120420
acceptlanguage: es-ES, en-US
Content-Type: multipart/alternative;
	boundary="_000_CBC4410F4651tepyahooinccom_"
MIME-Version: 1.0

--_000_CBC4410F4651tepyahooinccom_
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

Hi,
   We've noticed that while extracting Microdata propItems, elements with m=
issing, empty or whitespace string values results in an IllegalArgumentExce=
ption being thrown.

HTML that trigger this could be one of:

<span itemprop=3D"nameA"></span>


<meta itemprop=3D"nameB">

<meta itemprop=3D"nameC" content=3D"  ">

The code explicitly check for this condition in ItemPropValue.itemPropValue=
():


if(content instanceof String && ((String) content).trim().length() =3D=3D 0=
) {

    throw new IllegalArgumentException("Invalid content '" + content + "'")=
;

}

Is this correct behavior?  Is it not possible that some properties could le=
gally have an empty string as a value?  I looked at the RFC and it seems th=
at having no value should be treated as an empty string, but it doesn't sta=
te that empty values are illegal.

http://www.w3.org/TR/html5/microdata.html#values

Regards,
  Tim P.

--_000_CBC4410F4651tepyahooinccom_
Content-Type: text/html; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

<html><head></head><body style=3D"word-wrap: break-word; -webkit-nbsp-mode:=
 space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-si=
ze: 14px; font-family: Calibri, sans-serif; "><div><div style=3D"font-famil=
y: Calibri, sans-serif; font-size: 14px; color: rgb(0, 0, 0); ">Hi,&nbsp;</=
div><div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color:=
 rgb(0, 0, 0); ">&nbsp; &nbsp;We've noticed that while extracting Microdata=
 propItems, elements with missing, empty or whitespace string values result=
s in an IllegalArgumentException being thrown.</div><div style=3D"font-fami=
ly: Calibri, sans-serif; font-size: 14px; color: rgb(0, 0, 0); "><br></div>=
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; color: rgb=
(0, 0, 0); ">HTML that trigger this could be one of:</div><div style=3D"fon=
t-family: Calibri, sans-serif; font-size: 14px; color: rgb(0, 0, 0); "><br>=
</div><div style=3D"font-family: Calibri, sans-serif; font-size: 14px; colo=
r: rgb(0, 0, 0); "><span class=3D"Apple-style-span" style=3D"color: rgb(150=
, 31, 141); font-family: Monaco; font-size: 11px; "><span style=3D"color: r=
gb(0, 146, 146); ">&lt;</span><span style=3D"color: rgb(75, 145, 145); ">sp=
an</span><span style=3D"color: rgb(0, 0, 0); ">&nbsp;</span>itemprop<span s=
tyle=3D"color: rgb(0, 0, 0); ">=3D</span><span style=3D"color: rgb(66, 57, =
246); ">"nameA"</span><span style=3D"color: rgb(0, 146, 146); ">&gt;&lt;/</=
span><span style=3D"color: rgb(75, 145, 145); ">span</span><span style=3D"c=
olor: rgb(0, 146, 146); ">&gt;</span></span></div><div style=3D"font-family=
: Calibri, sans-serif; font-size: 14px; color: rgb(0, 0, 0); "><br></div><d=
iv style=3D"color: rgb(0, 0, 0); font-family: Calibri; font-size: medium; "=
><p style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin=
-left: 0px; font: normal normal normal 11px/normal Monaco; color: rgb(150, =
31, 141); "><span style=3D"color: rgb(0, 146, 146); ">&lt;</span><span styl=
e=3D"color: rgb(75, 145, 145); ">meta</span><span style=3D"color: rgb(0, 0,=
 0); ">&nbsp;</span>itemprop<span style=3D"color: rgb(0, 0, 0); ">=3D</span=
><span style=3D"color: rgb(66, 57, 246); ">"nameB"</span><span style=3D"col=
or: rgb(0, 146, 146); ">&gt;</span></p></div><div style=3D"color: rgb(0, 0,=
 0); font-family: Calibri; font-size: medium; "><font class=3D"Apple-style-=
span" face=3D"Calibri,sans-serif"><br></font></div><div style=3D"color: rgb=
(0, 0, 0); font-family: Calibri; font-size: medium; "><span class=3D"Apple-=
style-span" style=3D"color: rgb(150, 31, 141); font-family: Monaco; font-si=
ze: 11px; "><span style=3D"color: rgb(0, 146, 146); ">&lt;</span></span><sp=
an class=3D"Apple-style-span" style=3D"color: rgb(150, 31, 141); font-famil=
y: Monaco; font-size: 11px; "><span style=3D"color: rgb(75, 145, 145); ">me=
ta</span></span><span class=3D"Apple-style-span" style=3D"color: rgb(150, 3=
1, 141); font-family: Monaco; font-size: 11px; "><span style=3D"color: rgb(=
0, 0, 0); ">&nbsp;</span></span><span class=3D"Apple-style-span" style=3D"c=
olor: rgb(150, 31, 141); font-family: Monaco; font-size: 11px; ">itemprop</=
span><span class=3D"Apple-style-span" style=3D"color: rgb(150, 31, 141); fo=
nt-family: Monaco; font-size: 11px; "><span style=3D"color: rgb(0, 0, 0); "=
>=3D</span></span><span class=3D"Apple-style-span" style=3D"color: rgb(150,=
 31, 141); font-family: Monaco; font-size: 11px; "><span style=3D"color: rg=
b(66, 57, 246); ">"nameC"</span></span><span class=3D"Apple-style-span" sty=
le=3D"color: rgb(150, 31, 141); font-family: Monaco; font-size: 11px; "><sp=
an style=3D"color: rgb(0, 0, 0); ">&nbsp;</span></span><span class=3D"Apple=
-style-span" style=3D"color: rgb(150, 31, 141); font-family: Monaco; font-s=
ize: 11px; ">content</span><span class=3D"Apple-style-span" style=3D"color:=
 rgb(150, 31, 141); font-family: Monaco; font-size: 11px; "><span style=3D"=
color: rgb(0, 0, 0); ">=3D</span></span><span class=3D"Apple-style-span" st=
yle=3D"color: rgb(150, 31, 141); font-family: Monaco; font-size: 11px; "><s=
pan style=3D"color: rgb(66, 57, 246); ">"&nbsp; "</span></span><span class=
=3D"Apple-style-span" style=3D"color: rgb(150, 31, 141); font-family: Monac=
o; font-size: 11px; "><span style=3D"color: rgb(0, 146, 146); ">&gt;</span>=
</span></div><div style=3D"font-family: Calibri; font-size: medium; "><div =
style=3D"color: rgb(0, 0, 0); font-family: Calibri; font-size: medium; "><f=
ont class=3D"Apple-style-span" face=3D"Monaco" size=3D"2">&nbsp;</font></di=
v><div style=3D"color: rgb(0, 0, 0); ">The code explicitly check for this c=
ondition in ItemPropValue.itemPropValue():</div><div style=3D"font-family: =
Monaco; font-size: small; color: rgb(0, 0, 0); "><br></div><div style=3D"fo=
nt-family: Monaco; font-size: small; "><p style=3D"color: rgb(0, 0, 0); mar=
gin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font=
: normal normal normal 11px/normal Monaco; "><span style=3D"color: rgb(149,=
 21, 101); ">if</span>(content&nbsp;<span style=3D"color: rgb(149, 21, 101)=
; ">instanceof</span>&nbsp;String &amp;&amp; ((String) content).trim().leng=
th() =3D=3D 0) {</p><p style=3D"margin-top: 0px; margin-right: 0px; margin-=
bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Monac=
o; ">&nbsp; &nbsp; throw&nbsp;<span style=3D"color: rgb(149, 21, 101); ">ne=
w</span>&nbsp;IllegalArgumentException(<span style=3D"color: rgb(66, 57, 24=
6); ">"Invalid content '"</span>&nbsp;+ content +&nbsp;<span style=3D"color=
: rgb(66, 57, 246); ">"'"</span>);</p><p style=3D"color: rgb(0, 0, 0); marg=
in-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font:=
 normal normal normal 11px/normal Monaco; ">}</p></div><div style=3D"font-f=
amily: Monaco; font-size: small; color: rgb(0, 0, 0); "><br></div><div styl=
e=3D"color: rgb(0, 0, 0); ">Is this correct behavior? &nbsp;Is it not possi=
ble that some properties could legally have an empty string as a value? &nb=
sp;I looked at the RFC and it seems that having no value should be treated =
as an empty string, but it doesn't state that empty values are illegal.</di=
v></div><div style=3D"color: rgb(0, 0, 0); font-family: Calibri; font-size:=
 medium; "><br></div><div style=3D"color: rgb(0, 0, 0); font-family: Calibr=
i; font-size: medium; "><a href=3D"http://www.w3.org/TR/html5/microdata.htm=
l#values">http://www.w3.org/TR/html5/microdata.html#values</a></div><div st=
yle=3D"color: rgb(0, 0, 0); font-family: Calibri; font-size: medium; "><br>=
</div><div style=3D"color: rgb(0, 0, 0); font-family: Calibri; font-size: m=
edium; ">Regards,</div><div style=3D"color: rgb(0, 0, 0); font-family: Cali=
bri; font-size: medium; ">&nbsp; Tim P.</div></div></body></html>

--_000_CBC4410F4651tepyahooinccom_--