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== Summary ==

Intermediate level GObject based libraries stack.

== Concepts ==

[[File:polyol.png|500px]]

* Glucose - sugar core processes.

* Polyol - level that contains glucose compatibility libraries and libraries that are not tied to glucose directly (or not tied at all).<br>The reason for such a level is that it will be deployed by 0install, e.g., it would be possible to have a recent Polyol stack on Sugar 0.82.
** all libraries are written in Vala, i.e., based on pure GObjects, and could be used by non-python-based activities.
** each Polyol component has its own release schedule, i.e., there are no Polyol official releases (it looks like in Gentoo)
** glucose compatibility components will support several (popular among sugar deployers) sugar releases
** except for the glucose compatibility components, all Polyol libraries are glucose independent.

* Activity - regular activities would not use glucose directly, rather they would only access glucose through the Polyol level.<br>There is no need to code special activities, the sugar-toolkit API will be preserved, and activity developers will benefit because Polyol will support the recent sugar-toolkit API, e.g., they could use the new toolbars design even on Sugar 0.82.