CARIS Bathy DataBASE Server : Support Files : Filters
 

Filters

 
Logical Operators
Comparison Operators
Filter Examples
Internal Functions

All files for quality control and mapping use filters. There are two types of filtering operators:

• comparison

• logical

These can be combined to create complex filtering rules.

An example of a filter is shown below.

<!-- QC Test 56: Check that BUAARE objects are covered by a LNDARE Area. -->

<Test Id="S-58 56">

  <Filter>

    <Not>

      <GeometryIsWithin>

        <Filter>

          <And>

            <ObjectAcronymIsEqualTo Acronym="LNDARE" />

            <PrimitiveIsEqualTo Primitive="Area" />

          </And>

        </Filter>

      </GeometryIsWithin>

    </Not>

  </Filter>

  <Message Level="WARNING" Description="Check that any BUAARE

   object is covered by a LNDARE object of type Area."

   Reference="S-58 Test 56. Conformity to: LogicalConsistency" />

</Test>

The entries in red are operators:

• <Not> and <And> are logical operators.

• <ObjectAcronymIsEqualTo/>, <PrimitiveIsEqualTo/>, and <GeometryIsWithin/> are comparison operators.

Filters can use internal functions. Internal function are called from the application and apply specific tests to data. For more information, see Internal Functions