Length and ending dot limitation for screenshot captions

[sophie-h]

What are the reasons for appstream-glib for not following the "ideally not more than 256 characters" recommendation of the standard and not allowing a dot at the end of a caption?

I haven't seen any use of captions in Software or on Flathub but I would like to use them on apps.gnome.org. However, the limitations seem a bit harsh to me.

[ximion]

tbh, 256 characters is probably waaaaay too many for a caption. I should change the specification to recommend something like max 100/120 instead, actually. People shouldn't write tutorials and novels in short caption texts. That's also the reason for the "no dot" rule: This is not supposed to be a full text. The AppStream reference implementation has similar checks actually, but they won't make your data invalid. You will get a notification about this though if you run appstreamcli validate. I haven't tested this, but I think when using validate-relax even appstream-glib will not be so violent about missing dots and fail validation.