rule-snippet.xml

  <Aggregate type="min" required="true">
    <Compare metric="inequality" required="false">
      <Input path="?a" />
      <Input path="?b" />
    </Compare>
    <Aggregate type="average">
      <Compare metric="equality" required="true">
        <TransformInput function="lowerCase">
          <TransformInput function="removeSpecialChars">
            <Input path="?a/gr:legalName"/>
          </TransformInput>
        </TransformInput>
        <TransformInput function="lowerCase">
          <TransformInput function="removeSpecialChars">
            <Input path="?b/gr:legalName"/>
          </TransformInput>
        </TransformInput>
      </Compare>
      <Compare metric="wgs84" required="true" threshold="2">
        <Input path="?a/schema:address/schema:geo/wgs84:geometry" />
        <Input path="?b/schema:address/schema:geo/wgs84:geometry" />
        <Param name="unit" value="km"/>
      </Compare>
    </Aggregate>    
  </Aggregate>

test.ttl

@prefix gr: <http://purl.org/goodrelations/v1#> .
@prefix e: <http://example.com/> .
@prefix wgs84: <http://www.w3.org/2003/01/geo/wgs84_pos#> .
@prefix schema: <http://schema.org/> .


e:e1 gr:legalName "abcd" ;
  a gr:BusinessEntity ;
  schema:address e:e1a .
e:e1a schema:geo e:e1ag .
e:e1ag wgs84:geometry "50.0839201 14.4415697" .

e:e2 gr:legalName "abcd" ;
  a gr:BusinessEntity ;
  schema:address e:e2a .
e:e2a schema:geo e:e2ag .
e:e2ag wgs84:geometry "50.089617 14.4130565" .

e:e3 gr:legalName "abcd" ;
  a gr:BusinessEntity ;
  schema:address e:e3a .
e:e3a schema:geo e:e3ag .
e:e3ag wgs84:geometry "50.0957209 14.3857314" .

e:e4 gr:legalName "abcd" ;
  a gr:BusinessEntity ;
  schema:address e:e4a .
e:e4a schema:geo e:e4ag .