​Namespaces and Indices

HTML namespaces

Avoid using reserved strings for HTML ids, classes and attributes:

• System generated IDs and classes always start with the prefix fx_
  
• System generated data attributes start with the prefix data-fx-
  

You should never use these prefixes within your HTML.

HTML elements with z-index

The span of z-indexes between 1 and 1,000 and above 2,000 should be reserved for the pixolino toolbars. In other words: you are restricted to use values within the span between 1,001 and 2,000 in your CSS.