Question on value based constraints

Readme.md

you can try it out here -> http://shacl.org/playground/

data_graph.ttl

@prefix ex: <http://example.org/ns#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <http://schema.org/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

ex:Alice
    a ex:Person ;
    ex:hasAddress "Street xzy plz 12345 ..." ;
    ex:addressType "simpleAddress".

ex:Bob
    a ex:Person ;
    ex:hasAddress ex:BobsAddress ;
    ex:addressType "complexAddress" .

ex:BobsAddress
    a ex:complexAddress ;
    schema:streetAddress "1600 Amphitheatre Pkway" ;
    schema:postalCode 9404 .

ex:Tom
    a ex:Person ;
    ex:hasAddress "Street xzy plz 12345 ..." ;
    ex:addressType "complexAddress".

ex:Claire
    a ex:Person ;
    ex:hasAddress ex:ClairesAddress ;
    ex:addressType "simpleAddress" .

ex:ClairesAddress 
    a ex:complexAddress ;
    schema:streetAddress "1600 Amphitheatre Pkway" ;
    schema:postalCode 9404 .

shapes_graph.ttl

@prefix dash: <http://datashapes.org/dash#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <http://schema.org/> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ex: <http://example.org/ns#> .

ex:PersonShape
    a sh:NodeShape ;
    sh:targetClass ex:Person ;
    sh:xone (
    [ 
      sh:property [
        sh:path ex:hasAddress ;
        sh:datatype xsd:string ;
      ] ;
      sh:property [
        sh:path ex:addressType ;
        sh:hasValue "simpleAddress" ;
      ] 
    ]
    [ 
      sh:property [
        sh:path ex:hasAddress ;
        sh:class ex:complexAddress ;
      ] ;
      sh:property [
        sh:path ex:addressType ;
        sh:hasValue "complexAddress" ;
      ] 
    ]
  ) .

validation_report.ttl

[
	a sh:ValidationResult ;
	sh:resultSeverity sh:Violation ;
	sh:sourceConstraintComponent sh:XoneConstraintComponent ;
	sh:sourceShape ex:PersonShape ;
	sh:focusNode ex:Tom ;
	sh:value ex:Tom ;
] .
[
	a sh:ValidationResult ;
	sh:resultSeverity sh:Violation ;
	sh:sourceConstraintComponent sh:XoneConstraintComponent ;
	sh:sourceShape ex:PersonShape ;
	sh:focusNode ex:Claire ;
	sh:value ex:Claire ;
] .