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why not a meaningful DRM
While not as sexy or purposeful as slick design features, why not a meaningful DRM built into the font for both mobile and desktop use?
You are perhaps unaware that DR restriction, aka lack of DRM, is causing Hundreds of Thousands of Google and Adobe advertisers and publishers to lose their type identities. Both Google and Adobe have said as much publicly.
That ain't open, for business.
I think the TypeKit Library Manager's office has been open for business since web fonts started?
If you want to take on paid contracts for making libre fonts, email me.
Craig & Ray: I think DecoType's ACE does a lot of what you are describing. The manual is online, https://www.google.com/search?q=tasmeem+manual
If a table contained assurance to poor vulnerable [Adobe] that the font being used in an ad on their service, was absolutely licensed, what would happen!?;)
Just to tie a knot in my collision shape thing: now that I've thought about it some more, it would probably be better to simply do this sort of thing in font software and have it spit out some concise, super efficient kerning and class tables.
That presumes that the spacing in question is something that can be expressed in kerning and class tables. Microsoft's MATH table uses cut-in shape kerning precisely because the spacing involved between dynamically scaled and vertically offset glyphs cannot be expressed in regular pair/class kerning data formats. Likewise, cascading Arabic involves relationships of rise and run that cannot be easily predicted and are too complex even for OpenType's contextual kerning lookup data formats.
a pixel centric measuring system
Dave: "I'll leave Google out of this because they, as you say, seems to be open for business with libre fonts."
...but then, you become infinitely less important. You will change back into your Google clothes soon, I'm guessing. Open for business is not open to business.
This licensing issue cluster fuck was brought up to us by Google and then by Adobe
What about a "check for update" option? We could add an URL that points to a plain text file with a version number. If the version number doesn't match the one in the font, display a message to "contact your vendor for the latest version" and include an URL for that as well.