a9601b6a_PDML_Specification__Description
[Attribute] show (required) [Description] 
It keeps the field value in a "printable" form. In other words, the content of the value attribute depends on the showsep, showgrp and showtype attributes of the corresponding field in the NetPDL description. For instance, let us suppose a 48 bit field (like the MAC address) described with the following attributes in the NetPDL language: <... showtype="hex" showgrp="3" showsep="-"> If the field value is "ffffffffffff" (which is stored into the attribute value), the content of the show attribute will be "ffffff-ffffff". See the Standard Visualization Attributes Section in the NetPDL Visualization Extension for more details.
PDML Specification
Description