Silk linkage rule with compact IRIs in RestrictTo

silk_lsl.xml

<?xml version="1.0"?>
<Silk>
  <Prefixes>
    <Prefix id="dcterms" namespace="http://purl.org/dc/terms/"/>
    <Prefix id="owl" namespace="http://www.w3.org/2002/07/owl#"/>
    <Prefix id="rdf" namespace="http://www.w3.org/1999/02/22-rdf-syntax-ns#"/>
    <Prefix id="rdfs" namespace="http://www.w3.org/2000/01/rdf-schema#"/>
    <Prefix id="rov" namespace="http://www.w3.org/ns/regorg#"/>
    <Prefix id="schema" namespace="http://schema.org/"/>
    <Prefix id="skos" namespace="http://www.w3.org/2004/02/skos/core#"/>
  </Prefixes>
  <DataSources>
    <Dataset id="VVZ" type="sparqlEndpoint">
      <Param name="pageSize" value="1000"/>
      <Param name="clearGraphBeforeExecution" value="false"/>
      <Param name="pauseTime" value="0"/>
      <Param name="retryCount" value="3"/>
      <Param name="endpointURI" value="http://localhost:8890/sparql"/>
      <Param name="strategy" value="subQuery"/>
      <Param name="retryPause" value="1000"/>
      <Param name="graph" value="http://linked.opendata.cz/resource/dataset/isvz.cz"/>
      <Param name="queryParameters" value=""/>
      <Param name="login" value=""/>
      <Param name="useOrderBy" value="true"/>
      <Param name="entityList" value=""/>
      <Param name="password" value=""/>
    </Dataset>
  </DataSources>
  <Interlinks>
    <Interlink id="LinkInvalidIco">
      <SourceDataset dataSource="VVZ" var="a" typeUri="http://schema.org/Organization">
        <RestrictTo>
          ?a rov:registration ?registration .
          ?registration dcterms:valid false .
        </RestrictTo>
      </SourceDataset>
      <TargetDataset dataSource="VVZ" var="b" typeUri="http://schema.org/Organization">
        <RestrictTo>
          ?b rov:registration ?registration .
          ?registration skos:inScheme &lt;http://linked.opendata.cz/resource/concept-scheme/CZ-ICO&gt; .
        </RestrictTo>
      </TargetDataset>
      <LinkageRule linkType="owl:sameAs">
        <Aggregate id="average1" required="false" weight="1" type="average">
          <Compare id="levenshteinDistance1" required="true" weight="3" metric="levenshteinDistance" threshold="1.0" indexing="true">
            <Input id="sourcePath1" path="/rov:registration/skos:notation"/>
            <Input id="targetPath1" path="/rov:registration/skos:notation"/>
            <Param name="minChar" value="0"/>
            <Param name="maxChar" value="9"/>
          </Compare>
          <Compare id="jaroWinkler" required="true" weight="1" metric="jaroWinkler" threshold="0.2" indexing="true">
            <TransformInput id="alphaReduce1" function="alphaReduce">
              <TransformInput id="lowerCase1" function="lowerCase">
                <Input id="sourcePath2" path="schema:legalName"/>
              </TransformInput>
            </TransformInput>
            <TransformInput id="alphaReduce2" function="alphaReduce">
              <TransformInput id="lowerCase" function="lowerCase">
                <Input id="targetPath2" path="schema:legalName"/>
              </TransformInput>
            </TransformInput>
          </Compare>
        </Aggregate>
        <Filter limit="1"/>
      </LinkageRule>
      <Outputs>
        <Output id="invalid_ico_links"/>
      </Outputs>
    </Interlink>
  </Interlinks>
  <Outputs>
    <Dataset id="invalid_ico_links" type="file">
      <Param name="file" value="invalid_ico_plus_legal_name_vvz.nt"/>
      <Param name="format" value="N-Triples"/>
    </Dataset>
  </Outputs>
</Silk>