# Trusted Data Access Control Based on Logistics Business Collaboration Semantics
## 4 Construction of Access Control Model
### Optimization of Access Control Policies
[[http://www.semanticweb.org/wuliu#hastocation](http://www.semanticweb.org/wuliu#hastocation)]([http://www.semanticweb.org/wuliu#hastocation](http://www.semanticweb.org/wuliu#hastocation)) -> <owl:ObjectProperty rdf:about=\"[[http://www.semanticweb.org/wuliu#hastocation](http://www.semanticweb.org/wuliu#hastocation)]([http://www.semanticweb.org/wuliu#hastocation](http://www.semanticweb.org/wuliu#hastocation))\"> <rdfs:subPropertyOf rdf:resource=\"[[http://www.w3.org/2002/07/owl#topObjectProperty](http://www.w3.org/2002/07/owl#topObjectProperty)]([http://www.w3.org/2002/07/owl#topObjectProperty](http://www.w3.org/2002/07/owl#topObjectProperty))\"/> <rdfs:domain rdf:resource=\"[[http://www.semanticweb.org/wuliu#Subject](http://www.semanticweb.org/wuliu#Subject)]([http://www.semanticweb.org/wuliu#Subject](http://www.semanticweb.org/wuliu#Subject))\"/> <rdfs:range rdf:resource=\"[[http://www.semanticweb.org/wuliu#Environmental](http://www.semanticweb.org/wuliu#Environmental)]([http://www.semanticweb.org/wuliu#Environmental](http://www.semanticweb.org/wuliu#Environmental)) Attributes\"/> <rdfs:range rdf:resource=\"[[http://www.semanticweb.org/wuliu#Location](http://www.semanticweb.org/wuliu#Location)]([http://www.semanticweb.org/wuliu#Location](http://www.semanticweb.org/wuliu#Location))\"/> </owl:ObjectProperty> <l-. [[http://www.semanticweb.org/wuliu#hastole](http://www.semanticweb.org/wuliu#hastole)]([http://www.semanticweb.org/wuliu#hastole](http://www.semanticweb.org/wuliu#hastole)) -> <owl:ObjectProperty rdf:about=\"[[http://www.semanticweb.org/wuliu#hastole](http://www.semanticweb.org/wuliu#hastole)]([http://www.semanticweb.org/wuliu#hastole](http://www.semanticweb.org/wuliu#hastole))\"> <rdfs:subPropertyOf rdf:resource=\"[[http://www.w3.org/2002/07/owl#topObjectProperty](http://www.w3.org/2002/07/owl#topObjectProperty)]([http://www.w3.org/2002/07/owl#topObjectProperty](http://www.w3.org/2002/07/owl#topObjectProperty))\"/> <rdfs:domain rdf:resource=\"[[http://www.semanticweb.org/wuliu#Subject](http://www.semanticweb.org/wuliu#Subject)]([http://www.semanticweb.org/wuliu#Subject](http://www.semanticweb.org/wuliu#Subject))\"/> <rdfs:range rdf:resource=\"[[http://www.semanticweb.org/wuliu#Role](http://www.semanticweb.org/wuliu#Role)]([http://www.semanticweb.org/wuliu#Role](http://www.semanticweb.org/wuliu#Role))\"/> <rdfs:range rdf:resource=\"[[http://www.semanticweb.org/wuliu#SubjectAttribute](http://www.semanticweb.org/wuliu#SubjectAttribute)]([http://www.semanticweb.org/wuliu#SubjectAttribute](http://www.semanticweb.org/wuliu#SubjectAttribute))\"/> </owl:ObjectProperty> <  
There are several benefits to optimizing access policies using the Jena inference engine:  
1. Dynamic Rule Management Facilitates the dynamic management of rules through separate, easily modifiable files, enhancing system flexibility and responsiveness. 2. Conflict Resolution Identifies and helps resolve conflicts in access control rules, ensuring semantic consistency. 3. Redundancy Elimination Detects and allows for the removal of redundant rules, streamlining the rule set for efficiency. Figure 4: Owl file. In summary, the Jena inference engine offers a robust framework for optimizing access control policies within the logistics domain. By leveraging Jena's capabilities, logistics organizations can ensure that their access control policies are both effective and aligned with the semantics of their collaborative operations, thereby enhancing data security and operational efficiency.