Design Change Rules

Design Change Rules use Selection Criteria to define the changed design elements to which the rule is to apply, in a similar manner to Representation and Hatching Rules. The manner in which each changed design element is marked is defined by the referenced Design Change Style. It is therefore possible to mark different types of elements in different ways, or not at all.

The DCRULE attributes, with their defaults, are as follows:

for further information on using Selection Criteria refer to Design Reference Manual, Part 1 General Commands.

For changes to be highlighted properly the Selection Criterion should use one of the functions that make use of the current Comparison Date. These are; CREATED and MODIFIED. For example:

CRIT ALL BRAN MEM WITH (MODIFIED (GEOM))

CRIT ALL SCTN WITH (MODIFIED (LENGTH))

CRIT ALL EQUI WITH (CREATED ())

CRIT ALL WITH (CREATED ())

for further information on the CREATED() and MODIFIED() functions and their use in AVEVA Plant expressions refer to Design Reference Manual, Part 1 General Commands.

Note that a third function associated with the Comparison Date, DELETED(), is not relevant here, deleted design elements will not be shown on Draft drawings and hence cannot be highlighted.