Notes on Rules and Rule Expressions

AVEVA Clash Manager™ 14.3 User Guide

Entry Information : Notes on Rules and Rule Expressions

Notes on Rules and Rule Expressions

Rule expressions are used in the syntax of Rules used for the evaluation of:

•

the automatic assignment of clashes to disciplines

•

the automatic acceptance and status definition of clashes.

Expression Components

Each expression consists of an Element, an Attribute and a Value.

Keywords are used for Elements and can be used for Attributes and Values, all keywords are prefixed by ‘@'.

Element keywords may be:

•

@general which refers to the clash

•

@element-1 which refers to one of the clashing elements

•

@element-2 which refers to the other element.

Note:

No particular order is implied and there is no relationship to the elements 1 & 2 shown on the Clash Report.

Attribute may be a Keyword related to the Item, or may be any Attribute, for example SHOP, or NAME etc.

Value may be selected from a list-of-values related to the given attribute, or a Regular Expression, (Refer to Notes on Wildcards) or a Keyword (Refer to Expression Syntax).

Note:

The rules are formed by logical 'AND' operators between the expressions. There is no facility for logical 'OR' operators.

Expression Syntax


Element	Attribute	Value
@element-1 @element-2	Assignment & Acceptance Rules
	@class (field name is project defined)	A Defined Class
	@priority (field name is project defined)	A Defined priority
	@areacode (field name is project defined)	Regular expression
	@discipline	A defined discipline
	Any base product attribute for example: NAME	Regular expression or keyword @element-2 or @element-1 which evaluates true if the given attribute has the same value as element-1 or element-2 respectively, or one of the keywords listed below. Expression can include one of the comparison operators > >= < <= together with a value, and will evaluate true if the condition is met for the given attribute value. Other keywords may be (where N is 1 or 2): @ref-of-element-N replaced with the reference of the clashing element, @ref-of-owner-ele-N replaced with the reference of the owner of the element, @first replaced with the first member of the clashing element @first+n replaced with the nth member of the clashing element, for example: @first+1 @last replaced with the last member of the clashing element @last-n replaced with nth from last member, for example: @last-1
	@gtype	A GTYPE selected from list. (This list originates from the AVEVA Clash Manager Configuration window - Gtype/Tracking tab.)
@general	Assignment & Acceptance Rules
	@status	A defined status
	@level	Clash Level, one of HH, HS, HI, II, IS, SS, NP selected from a drop-down list
	@type	Clash Type, one of CLAsh, CLEarence, TOUch selected from a drop-down list
	Assignment Rules
	@setDiscipline	Keyword @element-1 or @element-2. The owner discipline is set to that of element-1 or element-2 respectively.

Examples of Rules and their Syntax

Rule evaluates true if NAME of element 1 is same as element 2


Element	Attribute	Value
@element-1	NAME	@element-2

Rule evaluates true if the name of either element contains the text ‘TEMP’


Element	Attribute	Value
@element-1	NAME	TEMP

Rule evaluates true if name of either element begins with the text ‘/S/TEMP’


Element	Attribute	Value
@element-1	NAME	^/S/TEMP

Rule evaluates true if name of either element does not begin with the text ‘/S/TEMP’


Element	Attribute	Value
@element-1	NAME	!^/S/TEMP

Rule evaluates true if name of neither element begins with the text ‘/S/TEMP’


Element	Attribute	Value
@element-1	NAME	!^/S/TEMP
@element-2	NAME	!^/S?TEMP

Rule evaluates true if either element is PIPING and type of clash is TOUching


Element	Attribute	Value
@element-1	@discipline	PIPING
@general	@type	TOU

Rule evaluates true if one element is PIPING, the other STRUCTURAL, the name of the STRUCTURAL item contains the text TEMP and type of clash is TOUching


Element	Attribute	Value
@element-1	@discipline	PIPING
@general	@type	TOU
@element-2	@discipline	STRUCTURAL
@element-2	NAME	TEMP

Rule evaluates true if both elements are STRUCTURAL, the GTYPE of a clashing element is PANEL and the type of clash is TOUching


Element	Attribute	Value
@element-1	@discipline	STRUCTURAL
@general	@type	TOU
@element-2	@discipline	STRUCTURAL
@element-1	@gtype	PANE

Rule evaluates true if both elements have values of UDA :LSIZE that meet their respective conditions.


Element	Attribute	Value
@element-1	:LSIZE	> 1500
@element-2	:LSIZE	< 100

Rule evaluates true for a clash between a nozzle and a flange as second last member of a connected branch.


Element	Attribute	Value
@element-1	@gtype	FLAN
@element-1	tref of owner	@ef-of-element-2
@element-1	sequence	@last-1
@element-2	cref	@ref-of-owner-ele-1
@element-2	@gtype	NOZZ

Rule evaluates true for a clash between a nozzle and a flange as second member of a connected branch.


Element	Attribute	Value
@element-1	@gtype	FLAN
@element-1	href of owner	@ef-of-element-2
@element-1	sequence	@first+1
@element-2	cref	@ref-of-owner-ele-1
@element-2	@gtype	NOZZ

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