Public vs non public CSS classes

• what class must absolutely exist and also to ensure we don't use non public classes in document content or in templates (non skin templates);
• The private (internal) vs API (public) list of classes would allow to separate CSS classes in 2 categories :
  • the ones with an agreed behavior that all skins must define, and that application (extensions, etc.) developers can rely on. (like we do with hidden, buttonswrapper, clearfloats, etc.) -> those are APIs
  • the ones that are used to "make the skin work" and for which we allow ourselves to change their behavior, remove them, not define them in all skins, etc. -> those are private, and the extension developers must not rely on them.

CSS ID

• #rightPanels, #leftPanels, #editPanels (panels, layout)
• #xwikimaincontainer (layout)
• #xwikimaincontainerinner (layout)
• #contentcontainer (layout)
• #contentcolumn (layout)
• #mainContentArea (layout) - introduces for Colibri
• #xwikicontent

CSS Classes

• .clearfloats (general)
• .hidden (general)
• .invisible (general)
• .loading (general) WYSWYG, GWT 
• .separator (general) actionMenu, breadcrumbs, tags, document-info
• .itemCount (general) docExtraTabs, archive panel, document-info

• .button (buttons)
• .buttonwrapper (buttons)

• .panel (panels)
• .xwikipaneltitle, .collapsed .xwikipaneltitle (panels)
• .xwikipanelcontents, .collapsed .xwikipanelcontents (panels)

• .hideleft, .hideright, .hidelefthideright (layout)
• .leftsidecolumns (layout)
• .main (layout)
• .content (layout)
• .alleditcontent