<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Hello Edmund and all,<br> The driver metadata should be embedded in the ICC-profile at the moment of the profile creation. If we than generate a MDF5 Hash, we can be shure, that nothing can be changed secretly after.<br> <br> So far as I know embedding and extracting of dictType Metadata is part of littleCMS and also handled through Oyranos and g-c-m / colord and CPD.<br> <br> So we have already a quite robust infrastructure to work with  printer a ICC-profile containing driver settings in a standardized way compliant to the ICC specs.<br> <br> We are all going big step forward.<br> Jan-Peter<br> <br> Am 21.06.11 22:52, schrieb edmund ronald: <blockquote cite="mid:BANLkTim8eNPOOX8mqPBw9KV0rzXcFr=Xzg@mail.gmail.com" type="cite">Till, I disagree with this. At that point we are tied to a complex externally managed data format which is similar to the Tiff format. It is a pain to modify a tag in the native (binary) version of an ICC profile, because you need to compute and write back the new tag offsets for all the fields behind your own, if I remember correctly See page 14 of  <div> <br> </div> <div> <a moz-do-not-send="true" href="http://www.color.org/ICC1v42_2006-05.pdf">http://www.color.org/ICC1v42_2006-05.pdf</a>   <div><br> </div> <div><br> </div> <div>The other problem is that the legal issues of circulating modified copies of an ICC profile is harder than the issue of just circulating the profile - imagine that I carefully make a copyrighted but creative commons licensed profile for eg. Epson Premium Luster  on the 4900 after determining inking. And now President Obama, while playing with a Linux distribution in his spare time :)  changes the inking condtions because he thinks prints need to be denser, and passes the modified profile around, without modifying the copyright tag (which it is usually forbidden to modify). Now a lot of people may start writing me to say that my profile prints very densely on some environments. I may get angry that my work has developed a behavior which I did not put into it. The simplest way of preventing such issues is to accept the idea that profiles are not intended to be changed *EVER* after being written. </div> <div><br> <div>Edmund<br> <div><br> </div> <div><br> <br> <div class="gmail_quote">On Tue, Jun 21, 2011 at 5:35 PM, Till Kamppeter <span dir="ltr"><<a moz-do-not-send="true" href="mailto:till.kamppeter@gmail.com">till.kamppeter@gmail.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div class="im">On 06/21/2011 05:30 PM, Jan-Peter Homann wrote:<br> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hello Richard,<br> I would recommend to embed the driver informations into CUPS raster file<br> as IPP attribute. like Till described it for CPD.<br> <br> we may should also consider to register at the ICC a Metdata Type for<br> Gutenprint driver settings.<br> <br> I will ask at the ICC about the necessary steps, that we are prepared to<br> do in near future.<br> </blockquote> <br> </div> You should ask for a Metadata type for general driver settings. This could simply be an ASCII string with undetermined length. It then can contain the settings as "opt1=choice1 opt2=choice2 ...". Note that not only Gutenprint but also other printer drivers can benefit from this.<br> <font color="#888888"> <br>   Till</font> <div> <div class="h5"><br> <br> _______________________________________________<br> openicc mailing list<br> <a moz-do-not-send="true" href="mailto:openicc@lists.freedesktop.org" target="_blank">openicc@lists.freedesktop.org</a><br> <a moz-do-not-send="true" href="http://lists.freedesktop.org/mailman/listinfo/openicc" target="_blank">http://lists.freedesktop.org/mailman/listinfo/openicc</a><br> </div> </div> </blockquote> </div> <br> </div> </div> </div> </div> </blockquote> <br> <br> <pre class="moz-signature" cols="72">-- ---------- Please note the new adress -------------- homann colormanagement --------- fon +49 30 611 075 18 Jan-Peter Homann ------------ mobile +49 171 54 70 358 Cotheniusstr. 3 -------- <a class="moz-txt-link-freetext" href="http://www.colormanagement.de">http://www.colormanagement.de</a> 10407 Berlin -------- <a class="moz-txt-link-freetext" href="mailto:homann@colormanagement.de">mailto:homann@colormanagement.de</a> </pre> </body> </html>