The Rulebase Pack consists of two custom transformers: the RulebaseChecker and the RulebaseAttributeChecker


Each transformer takes incoming features and compares them to a set of rules defined in a rules file.

Rulebase Checker

The RulebaseChecker tests feature geometry against the pre-defined rules. There is a set of rules per feature type.



The rulebase tests carried out are...

• FeatureTypeName - does the feature have a valid feature type.
• Geometry Type - is the feature's geometry type valid for this feature type.
• Geometry Dimension - should the geometry be 2d or 3d

An example Rulebase file is as follows...

FeatureTypeName,GeometryType,2or3D
GeometryType = xxxx where x = Y/N for point/line/polygon/text/null
2or3D = 2 or 3 (no geometry = 2)
--------------------EXAMPLE--------------------
level1,NYYNN,2
----DON'T DELETE THIS OR ANY PRECEEDING LINE----
level1,YNYNY,2

Rulebase Attribute Checker

The RulebaseAttributeChecker tests feature attributes against the pre-defined rules. There is a set of rules per attribute.



The attribute tests carried out are...

• AttributeName - does the feature have valid attribute names.
• Min Length - does the attribute meet the minimum length requirement
• Max Length - does the attribute meet the maximum length requirement
• Attribute Type - are the attribute contents valid for this attribute type (is it an integer, char, float or date)

An example Attribute Rulebase file is as follows...

FeatureTypeName,AttributeName,MinLength,MaxLength,Type
Type = x where x = C (Char) I (Integer) F (Float) D (Date)
--------------------EXAMPLE--------------------
level1,attribute1,0,10,C
----DON'T DELETE THIS OR ANY PRECEEDING LINE----
level1,attribute1,4,10,C
level1,attribute2,0,5,I

Output

Each transformer has separate ports for passed and failed features, and each output feature is supplied with attributes that detail the results for each test.