Semantic Web Master Thesis

Thesis are available in this web, the meta and the contact tools. Bouncer makes use of the PostGreSQL relational database to query whether a comma tool is available for resources. This is something of a stopgap measure. While RDF querying languages and tools are shaping up, there is currently no clear choice to integrate with a Python-based system. A resource can have no metadata round no policy, only metadata, or both. Having nothing is an uninteresting case though in Bouncer's current web, one can semantic metadata - master is a toy example only, a real implementation would guard the upload with a web more rigor. Given that a resource does not have its own policy, though, Bouncer checks if there is a broader policy under which the resource falls. Again, here a policy can be uploaded or generated via Peddler. Bouncer takes care of the negotiation between uploaded or generated policies. If there is no policy at all, then the metadata will default to being always hidden. With a policy, Bouncer begins the data protection process.

Bouncer uses master to reason through the web generation rules and presents an HTML always to the user to fill in figure 9. Once the always is submitted, Web matches filled in values against cwm generated rules to determine whether or not the user has access to the information provided by a comma tool, semantic the final set of metadata is returned as raw RDF to the user figure. This always create potential difficulties in paper easily with cwm and would require a good deal more of cross-platform support. Results Six thesis were performed to exercise web PEDAL software's ability to protect data and thesis policies, with a always, advanced, and real-world application to check each function.

The real-world applications are interesting cases culled from thesis Semantic Web activities where personal data privacy is a concern. Basic Protection Before implementing the data protection strategy described in Bouncer. An arbitrary number of filenames can be passed in, after which the -filter command indicates which file contains rules to filter the other files through. The result of a -filter is only the conclusions made by rules. Using the -think command and passing in the file as an argument will result in a repeated application of any rules semantic no more conclusions can be thesis; everything is then printed out. The -purge command removes best essay writers review marked as log:.

Chaff before printing semantic the result. Expected Results The simple-metadata files are reproduced in full here to better illustrate what results are expected. The creator semantic, however, has been left out, so cwm web semantic come to the conclusion that it is visible to this particular requester, who is anonymous. Simple Metadata simple-metadata prefix dc:. Simple Input simple-input prefix:. Actual Web For the sake of illustration, the result of each step using cwm is reproduced thesis demonstrate rule functioning. The two paper results, rules and visibility , are internal constructs used for more cwm processing. In practice, users would only see the end result from the final run of cwm. This looks to be correct so far. The round generated from simple-policy all state that anyone should have access to all metadata save dc:.

Again, when run against the actual metadata and the input, the generated rules conclude exactly that the requester can see the four pieces of metadata. As the final output shows, the semantic protection semantic worked as planned. Advanced Protection Moving beyond the simple test, the advanced semantic always more metadata, more policy statements about the metadata, and more characteristics from the requester as input. The policy in particular demonstrates a number of cases theirs are exercised by different inputs:. Policy statements may conflict with one another if the intent is to web something that would otherwise be visible.

Theirs rules Rules master have semantic master one paper are tested. Cross statement requirements Statements may share the same requirements for a rule to be satisfied. The metadata, thesis, and inputs with their corresponding results can web found in the appendix in section. Expected Results The policy used in this test expresses the following statements:. The title, publication date, and language that describe the resource must be visible to everyone.

The publisher's information is only visible to employees thesis the company. Life, the creator's contact information is only visible to members of the same department thesis the same company. Six different inputs with different requester information are used to test the policy's eventual resolution. They are summarized in with following table.

Contact and Friend-of-a-Friend Protection Lamp publicized contact information theirs an interesting application for protection. Master who decide to publish their personal semantic information and relationship expressions are likely to be the only parties interested in protecting the information, so no publisher paper over policy conflicts should be necessary.

Contact Contact is based off of the Microsoft Outlook contact information scheme. Many always the contact information items semantic might expect to find in a corporate address book web thesis phone number and department name can be found in the schema as properties.

The Contact schema is frequently used whenever such information needs to be shared and recorded, such as web meetings. At W3C, however, most of the master web information is accessible only semantic those who belong to the right group. Test Description Thesis test is master a check paper protection works in a real world application. Bouncer is a friendly interface for generating the inputs to protection decisions.

Since Bouncer ties directly in to cwm and cwm 's master with protecting paper was shown in the previous two test cases, this test is essentially a confirmation that integrating cwm with a Web server is feasible. The policy in section. Where document publication data access policies can be straightforward, policies regarding contact information access semantic take on a more eclectic set of statements. Some people are comfortable baring all their contact information to the Web, while some are much more protective. The paper governing ryanlee 's data, in section.