Eval Element (Data)

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The "eval" Element

A major facet of data file authoring it defining scripts on components and things for execution during the evaluation cycle. These scripts are referred to as Eval scripts and are invoked on each individual pick within the actor. Each separate script is specified through the use of an "eval" element. The complete list of attributes for this element is below.

phase	Id – Specifies the unique id of the evaluation phase during which the script is invoked.
priority	Integer – Specifies the evaluation priority during which the script is invoked.
name	(Optional) Text – Specifies the name assigned to this script for the purpose of establishing timing dependencies. If empty, no timing dependencies may be defined elsewhere that depend upon this script. Default: Empty.
PCDATA	TagExpr – Specifies the code comprising the Eval script.

The "eval" element also possesses child elements that pertain to the handling of the script. The list of these child elements is below and must appear in the order shown. Click on the link to access the details for each element.

match	An optional "match" element may appear as defined by the given link. This element defines the Match Tag Expression. If omitted, all things are assumed to match and the container requirement test is applied to them all. IMPORTANT! This element is only applicable when the container requirement is defined within a component. In all other cases, this element may not be specified.
before	Zero or more "before" elements may appear as defined by the given link. This element specifies appropriate timing dependencies possessed by the container requirement.
after	Zero or more "after" elements may appear as defined by the given link. This element specifies appropriate timing dependencies possessed by the container requirement.

The "match" Element

The "match" element defines the Match tag expression that determines whether a particular thing is subject to the container requirement. The tag expression is applied against each thing derived from the component, and the requirement is only assigned to things that satisfy the tag expression. The complete list of attributes for this element is below.

PCDATA

TagExpr – Specifies the code comprising the Match tag expression.

Example

The following example demonstrates what a "containerreq" element might look like. All default values are assumed for optional attributes.

<containerreq phase="Setup" priority="500" name="MyTest>
  <before name="BeforeTest"/>
  <after name="AfterTest"/>
  val:Level.? >= 4
  </containerreq>