A group attribute refers to a set of related primary attributes. They can be useful in the situation where the project deals with possibly very many primary attributes, but where the comments and rules can be more simply expressed in terms of groups rather than the individual attributes.

To create the group attribute open the Attribute Editor (Edit|Attribute Editor). From the Edit menu select ‘Add group attribute …’ and enter a name. Use the ‘Add’ button to include the appropriate primary attributes.

The group attribute will not be visible in the Case View as it has hidden property setting by default. It can be used to create calculated value attributes. For example, we can define the following five group attributes of allergen attributes:

Group Attribute Name

Attributes included in the Group

pollen

birch
timothy
mugwort

food

milk
egg white
peanut
soya
wheat

animal

dog
cat
horse

mould

cladosporium
alternaria

We can then create a calculated value attribute such as:

HighAllergens using the syntax:

{pollen, food, animal, mould} in range [50, 500]

In the case view, this will display if the values associated with the attributes fall between 50 and 500.

The calculated value attribute HighAllergens can be used as a variable expression in a comment:

"High IgE levels for the allergens {HighAllergens}."

and the condition giving this comment could be:

number of HighAllergens > 0

See also:

in range

number of