使用Jena規則更新本體三元組中的值

Question

我有個問題。 我有一條耶拿規則，例如：

[rule1:

(?if rdf:type p:InferredConfiguration)
(?if p:userName ?userEmail)
(?subProfile rdf:type u:PersonSubProfile)
(?subProfile u:hasUsername ?email)
equal(?userEmail, ?email)

(?subProfile u:hasName "")
(?subProfile u:hasLastname "")
(?subProfile u:hasPhone "")
(?subProfile u:hasEducation "Low")
->
(?subProfile u:hasPhone "00000")

print('**************** Phone defined - Rule 1 ***************')
]

問題在於上面的規則不會更新“ hasPhone”屬性的值，但是會增加一個值。 如何更新值或刪除舊值並添加新值？

謝謝。

Answer 1

我找到了解決方案

[rule1:

(?if rdf:type p:InferredConfiguration)
(?if p:userName ?userEmail)
(?subProfile rdf:type u:PersonSubProfile)
(?subProfile u:hasUsername ?email)
equal(?userEmail, ?email)

(?subProfile u:hasName "")
(?subProfile u:hasLastname "")
(?subProfile u:hasPhone ?var)
equal (?var, "")
(?subProfile u:hasEducation "Low")
  ->
drop(7)
(?subProfile u:hasPhone "00000")

print('**************** Phone defined - Rule 1 ***************')
]