eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences March 2018 30 3 20 29 http://dx.doi.org/10.22147/jusps-B/300301 1455 article The Soft Separation Axioms Semi- D2 in Soft Topological Spaces and in Soft Bi-Topological Spaces ARIF MEHMOOD KHATTAK 1 FAHAD JAMAL 2 ISHFAQ AHMED 2 Riphah International University Islamabad Math department (Pakistan) Qurtuba University of Science and Information Technology Peshawar Math Department (Pakistan) <p style="text-align: justify;">In this article the concept of Soft semi W-D<sub>2</sub> structure in soft topological spaces is introduced in different ways. There are many topological structures in soft topology but soft semi W-D2 topological structure is interesting and more practical because it is obtained from the mixture of two structures.</p> https://ultraphysicalsciences.org/paper/1455/ Soft Topology Soft set soft semi open set soft semi closed set