Michael and all,
I am not sure exactly when my membership in PWG lapses, but it may have done so already.
That being said, I read with interest the specifications for thermal / Label 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 backwards. 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 similar 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 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.
Thanks for taking time to read and consider this.
Bets regards,
Guy
Guy Tucker
Solutions Architect
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+1.860.968.9235
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