ARINC661 layer

A Layer is the top-level container of widgets in an ARINC 661 Definition File.

Layer properties

The main property of a Layer is its Layer ID. A Layer in a Definition File is specified by:

• The Application ID of its Definition File
• The Layer ID of the Layer

All Layers in a Definition File have the same Application ID. Note that it is forbidden for two Layers to share the same (Application ID, Layer ID) pair in all the Server.

Layer ID

A Layer is identified by:

• The Application ID of its Definition File
• The Layer ID

Note that the ARINC 661 runtime communication does not exchange the application ID, which means that the resolution of the Layer concerned by a block in the runtime Buffer is implementation dependant.

Widgets tree

The Layer is a container which contains a "tree" of widgets, called "widgets tree". Leafs in the tree are terminal widgets (such as for example an A661_PUSH_BUTTON, whereas container widgets (such as A661_PANEL) may contain children.