S 1 is not needed to guarantee safety after the first import. Since we can safely assume the signatures of the external ontologies to be disjoint (see remark at the end of Section 3.1), we automatically have 2, which implies that 3 and x -locality of O 1 w.r.t. However, this is generally a stronger restriction than 3 alone, and would need to be re-checked everytime S 2 is changed. First, we could as well replace Conditions 2 and 3 with requiring x -locality of O 1 w.r.t. The last step is due to the fact that both locality types are closed under the union of ontologies, which immediately follows from their definition. This, together with 1, yields that O ∪ O 1 is x -local with respect to S 2. Conditions 2 and 3 imply that 1 is x -local with respect to S 2. Luckily this program offers a way to undo user mistakes. This program is very easy to use, but novice users should always beware of changing anything in the registry. It is not necessary to pay anything to use the full version of this program, though.Įusing Free Registry Cleaner Portable helps speed up your computer by clearing out unnecessary registry entries. This program is freeware, but the author does ask for a donation in order to register the product. If the computer does not act correctly after changing the registry, you can always revert back to the previous registry data.

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