A keyword is a word with a predefined value. The available keywords are listed below.
Note that keywords are not case sensitive.
| Keyword | Returned value |
| E | 2.71828182845904523536 |
| Pi | 3.14159265358979 |
| SystemTime | Evaluates to the system time on the machine evaluating the expression, expressed in seconds since the 1st of January 1970, UTC. |
| Log10E | 0.434294481903251827651 |
| Log2E | 1.44269504088896340736 |
| Null | A value of Null |
| True | True |
| False | False |
| Entity | The value of the tag or entity (see below for explanation and examples) |
Entity
The Entity keyword replaces the THIS keyword from version 2.6.
Entity applies to the parent entity when a calculation is assigned as an attribute. For calculations assigned as attributes, the Entity keyword will be substituted by the parent entity name, provided that Entity is surrounded by non-alphanumeric characters (that is, it does not appear as part of another word).
In P2 Server, tags must be written between curly braces.
You can use the Entity keyword in 2 ways:.
In Entities
You can use Entity as a keyword to get back the name of the parent entity.
If you have entity1:attr1 with the expression "'parent entity is: ' + entity" it would return a single value with a string data type of :
parent entity is: entity1
The syntax for specifying an attribute is as follows:
{Entity:AttributeDefinition}
{Entity[TemplateDefinition]:AttributeDefinition}
{Entity:AttributeDefinition!AttributeValueDefinition}
{Entity[TemplateDefinition]:AttributeDefinition!AttributeValueDefinition}
In Tags
You can use the Entity keyword in tag expressions. For example, you could create the following attributes and tags:
CalculatedDoubleTHP = {entity:THP} * 2
Well1:DoubleTHP = {CalculatedDoubleTHP}
Well2:DoubleTHP = {CalculatedDoubleTHP}
In this case, Entity would get replaced with Well1 or Well2 depending on which attribute is evaluated.