Schematic Model Manager
User Guide
Appendices
:
Appendix G: Configuration of Line Lists using Pseudo Attributes
: Example Rule: Component Rules - Butt Welded Piping Cap
Example Rule: Component Rules - Butt Welded Piping Cap
To illustrate the use of line list configuration rules, the following example will show how to conditionally populate the LLFROM and LLTO pseudo attributes with a substitution text string, which is applied based on a check of the component type at the termination of a pipeline.
The setup of the rule is displayed in the Rule Properties section of the dialog:
Each of the rule properties is explained below.
Rule Property
Value
Meaning
Attribute
LLFrom and LLTo
The pseudo attributes this rule will populate
End Condition
Valid HREF/TREF
Determines when this rule is applied - either when a branch is correctly terminated (as in this case), or when it is not correctly terminated, or always.
Item Types
DbElementType[]Array
The database element type that this rule applies to
Name
Butt Welded Piping Cap
The name of this rule
PML Expression
'But Welded Piping Cap'
A PML expression used to derive the value which will be used to populate LLFRON/LLTO. In this example it is a simple text string describing the type of element which terminates a pipeline.
PML Expression Object
EndComponent
The element used to derive LLFROM/LLTO - either the terminating SCBRANCH or, as in this case, the first/last component.
Rule Filters
--
Multiple filters can be added - in this example one filter is present which limits the applicability of this rule to pipe terminations which have a component class value of PipingCap
Once configured, the line list related pseudo attributes will be populated each time they are queried.
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