Block by Extended Attribute


Block by Extended Attribute eliminates each decision where the item at the specified source region location does not have an extended attribute that matches the item at the destination region tail location.


This function block has the following parameters:



Always Evaluate

Hard, Soft or Breakable. This parameter controls what happens when the extension eliminates all available decisions.

Hard: All decisions will remain eliminated. Enter a wait state after the logic script has completed.

Soft: Roll back any decisions eliminated by this extension.

Breakable: Roll back any decisions eliminated by this extension that have a danger point value of True (non zero). The routing modules will first use the danger defined for each individual decision; and, if no danger point has been configured for the decision, then the site-wide danger point will be used. If no danger point can be found for a decision, then the decision remains eliminated.

Item Class

All items with matching class will be used.


Number of locations in source regions to scan.

Attribute ID

Name of extended attribute to compare.

Start Character

Starting character of the extended attribute value to be used.

Attribute Length

Specifies the number of characters in the extended attribute value to compare.

End Character

Ending character of the extended attribute value to be used.

Enter zero in both the Start Character and Attribute Length fields to use all characters.

More information

Block by Attribute example.

Block by Attribute pseudo code.

Routing function blocks list.