Appendix G: Configuration of Line Lists using Pseudo Attributes

Schematic Model Manager User Guide

Appendices : Appendix G: Configuration of Line Lists using Pseudo Attributes

Appendix G: Configuration of Line Lists using Pseudo Attributes

To support the generation of line-related project deliverables, such as line lists with configurable content, several pseudo attributes have been added to line and branch elements in the schematic database.

These pseudo attributes are:


Element	Pseudo Attribute	Type	Purpose
SCPLIN SCBRAN	LLDIAGRAMS	Text	Calculated value. This is the combined DIAREF attributes of the SCSEGMENT elements within the SCBRANCH and any subsequent branches between the branch and LLTBRANCH, formatted as a text field to meet the user's format requirements
SCPLIN SCBRAN	LLENTRY	Bool	Determines if the SCPLINE and SCBRAN should be used in a line list deliverable. Pipeline and Branch selection may be user defined using a rule or manually set.
SCPLIN SCBRAN	LLFROM	Text	Derived values. Hold the text which indicates the source of the pipeline and branch. The method used to derive the content is user defined
SCBRAN	LLTBRANCH		Derived value. This is the SCBRANCH element where the main flow from the current branch terminates or leaves the current SCPLINE. This enables the user to access the attributes at the end of the line list entry such as the terminating BORE size (TBORE OF LLTBRANCH)
SCPLIN SCBRAN	LLTO		Derived Values. Hold the text which indicates the destination of the pipeline and branch. The method used to derive the content is user defined.

These pseudo attributes are configured using the Line List Configuration tool.

The line list related pseudo attributes are provided to allow users to:

•

Decide which piping-related elements are to be included on a line list report.

•

Define text values to describe the start and end values of pipelines and branches. These values may be populated using rule criteria.

•

Determine the SCBRAN element at the point where the main flow of a SCPLIN terminates, so that attributes of this SCBRAN may be accessed for reporting purposes.

The pseudo attributes are required because, due to the structure of the schematic database, line list related data is held by different elements at different levels in the schematic hierarchy.

The pipeline related hierarchy in the schematic database is:

Pipeline connectivity attributes exist at the SCBRAN and SCSEG level, but not at the SCPLIN level. In order to produce a line list report based on SCPLIN or SCBRAN elements, it is therefore necessary to determine the start and end of lines by examining the attributes of the component SCBRAN and SCSEG elements.

This appendix describes how the pseudo attributes may be used in conjunction with the Search Grid the and Excel Export functionality to produce a line list.

1974 to current year. AVEVA Solutions Limited and its subsidiaries. All rights reserved.