Four attributes are abbreviated as core. They are
A global identifier.
A list of classes separated by spaces.
style="..." Style information.
title="..." Provides more information for a specific element, as opposed to the <title> element, which entitles the entire Web page.
Two attributes for internationalization (i18n) are abbreviated as i18n:
lang="..." The language identifier.
dir=c The text direction (ltr, rtl).
The following intrinsic events are abbreviated events:
OnClick="..." A pointing device (such as a mouse) was single-clicked.
OnDblClick="..." A pointing device (such as a mouse) was double-clicked.
OnMouseDown="..." A mouse button was clicked and held down.
OnMouseUp="..." A mouse button that was clicked and held down was released.
OnMouseOver="..." A mouse moved the cursor over an object.
OnMouseMove="..." The mouse was moved.
OnMouseOut="..." A mouse moved the cursor off an object.
OnKeyPress="..." A key was pressed and released.
OnKeyDown="..." A key was pressed and held down.
OnKeyUp="..." A key that was pressed has been released.