Label specifications

"Tucker, Guy via ipp" <[email protected]> Wed, 3 Jun 2026 15:04:06 +0000
Newsgroups	gmane.ietf.ipp
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Michael and all,
I am not sure exactly when my membership in PWG lapses, but it may have don=
e so already.

That being said, I read with interest the specifications for thermal / Labe=
l devices. There is one attribute that I suggest you consider.

Labels come out of high-speed label printers in a direction that, when many=
 labels are printed as a stream, appear to the operator to be printed backw=
ards. Vendors provide a way to simply flip the labels 180 degrees and this =
"fixes" the perception problem. In ZPL, that is ^POI. DPL and IPL have simi=
lar bits, but if these mime-types are not in play, perhaps an attribute at =
the IPP level might be considered.

Another common situation we see is "job interweaving". Zebra devices are mu=
lti threaded, and can accept two or more jobs simultaneously. The problem i=
s that there is no concept of a job. If I have two ZPL data streams coming =
at the same time, labels from one stream may print between labels of the se=
cond stream. ZPL has no concept of a job, so anything between the initial ^=
XA and ^XZ which constitutes a single label is the only thing that is consi=
dered. I am not sure that this is fodder for a specification, but it is a p=
roblem in many high-speed environment where labels are generated from multi=
ple sources.

Thanks for taking time to read and consider this.
Bets regards,
Guy

Guy Tucker
Solutions Architect
[cid:[email protected]]
+1.860.968.9235


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<p class=3D"MsoNormal">Michael and all,<o:p></o:p></p>
<p class=3D"MsoNormal">I am not sure exactly when my membership in PWG laps=
es, but it may have done so already.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">That being said, I read with interest the specificat=
ions for thermal / Label devices. There is one attribute that I suggest you=
 consider.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Labels come out of high-speed label printers in a di=
rection that, when many labels are printed as a stream, appear to the opera=
tor to be printed backwards. Vendors provide a way to simply flip the label=
s 180 degrees and this &#8220;fixes&#8221; the
 perception problem. In ZPL, that is ^POI. DPL and IPL have similar bits, b=
ut if these mime-types are not in play, perhaps an attribute at the IPP lev=
el might be considered.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Another common situation we see is &#8220;job interw=
eaving&#8221;. Zebra devices are multi threaded, and can accept two or more=
 jobs simultaneously. The problem is that there is no concept of a job. If =
I have two ZPL data streams coming at the same
 time, labels from one stream may print between labels of the second stream=
. ZPL has no concept of a job, so anything between the initial ^XA and ^XZ =
which constitutes a single label is the only thing that is considered. I am=
 not sure that this is fodder for
 a specification, but it is a problem in many high-speed environment where =
labels are generated from multiple sources.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks for taking time to read and consider this.<o:=
p></o:p></p>
<p class=3D"MsoNormal">Bets regards,<o:p></o:p></p>
<p class=3D"MsoNormal">Guy<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:#7F7F7F;mso-ligatures:none;mso-fareast-language:EN-GB">Guy Tucker<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:#7F7F7F;mso-ligatures:none;mso-fareast-language:EN-GB">Solutions Architect=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:black;mso-fareast-language:EN-GB"><img width=3D"141" height=3D"53" style=
=3D"width:1.4687in;height:.552in" id=3D"Picture_x0020_5" src=3D"cid:image00=
[email protected]"><span style=3D"mso-ligatures:none"><o:p></o:p></sp=
an></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:#424242;mso-ligatures:none;mso-fareast-language:EN-GB">+1.860.968.9235</sp=
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<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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