The Standard Generalized Markup Language (SGML) allows users to deene document type deenitions (DTDs), which are essentially extended context-free grammars in a notation that is similar to extended Backus{Naur form. The right-hand side of a production is called a content model and its semantics can be modiied by exceptions. We give precise deenitions of the semantics of exceptions and prove tha...

the respect of property has recognized by the grate legal systems. despite of the recognition of this rule, there are some exceptions. expropriation, nationalization, confiscation and requisition are exceptions of the respect which cause the disputes in foreign investment. however national and international authorities, have different argumentations in ether violations of the respect to determi...