Some questions about the vCard photo

Hello,
I have read the XEP-0054 vcard-temp and XEP-0153:
vCard-Based Avatars
(maybe there are more ?) here are my questions:

1)A vCard photo and a avatar CAN be two different pictures.
If the user
not offer an avatare the client app CAN display the vCard
photo, is
this correct?

2) I found nowhere any description about the maximum size of
the vCard
for each field, the dimension of the vCard photo (I found
only some
recommendations about the avatar) or the size of the vCard
in sum. Is
the max size of the vCard limitied only by the server? If
yes, what's a
good/average maximum value for the size?

regards
Peter



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Peter Flindt wrote:
> Hello,
> I have read the XEP-0054 vcard-temp and XEP-0153:
vCard-Based Avatars
> (maybe there are more ?) here are my questions:
> 
> 1)A vCard photo and a avatar CAN be two different
pictures. If the user
> not offer an avatare the client app CAN display the
vCard photo, is
> this correct?

Right. But vCard only has the PHOTO element, so we work with
that in 
XEP-0054 and XEP-0153.

> 2) I found nowhere any description about the maximum
size of the vCard
> for each field, the dimension of the vCard photo (I
found only some
> recommendations about the avatar) or the size of the
vCard in sum. Is
> the max size of the vCard limitied only by the server?
If yes, what's a
> good/average maximum value for the size?

http://www.xmpp.org/extensions/xep-0153.html#bizrules
-image says:

1. The image SHOULD use less than eight kilobytes (8k) of
data; this 
restriction is to be enforced by the publishing client.

2. The image height and width SHOULD be between thirty-two
(32) and 
ninety-six (96) pixels; the recommended size is sixty-four
(64) pixels 
high and sixty-four (64) pixels wide.

3. The image SHOULD be square.

4. The image content type [6] SHOULD be image/gif,
image/jpeg, or 
image/png; support for the "image/png" content
type is REQUIRED, support 
for the "image/gif" and "image/jpeg"
content types is RECOMMENDED, and 
support for any other content type is OPTIONAL.

5. The image data MUST conform to the base64Binary datatype
[7] and thus 
be encoded in accordance with Section 6.8 of RFC 2045 [8],
which 
recommends that base64 data should have lines limited to at
most 76 
characters in length. However, any whitespace characters
(e.g., 'r' and 
'n') MUST be ignored.

BTW, on the jabber.org server we have a maximum message (in
fact 
"stanza") size of 65k, so if people have vCards
with large image data 
then the vCards won't be sent to their buddies. We have a
policy of 
contacting such people and telling them to trim their image
data.

Peter

-- 
Peter Saint-Andre
XMPP Standards Foundation
http://w
ww.xmpp.org/xsf/people/stpeter.shtml


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Peter Saint-Andre wrote :
> ...
> BTW, on the jabber.org server we have a maximum message
(in fact 
> "stanza") size of 65k, so if people have
vCards with large image data 
> then the vCards won't be sent to their buddies. We have
a policy of 
> contacting such people and telling them to trim their
image data.
> ...
> Peter

If I understand you correct, that means avatar and photo
SHOULD have
both the size from above, 96*96 max, recommend 64*64 less,
than 8KB,
but both images can be different?

My client handle both images, but only the avatar have
restriction for
the dimensions, the vCard photo have only a limit of
filesize (40kb),
therefore I thought the XEP docs talk only about the avatar,
my
mistake. ;)

Peter



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