Algorithm 2. Categorization of Cloud Services

Input: Customer Cloud Services Preferences with their Queries

Output: Cloud Services Ranking

Cloud Services Provider Main Categories [] = x1, x2, x3, … xi …, xn

Sub-Categories = cij $\in$ xi

Cloud Services Ranking System [xi] = Nil

Main Categories (mc)$\in$ PaaS, IaaS, SaaS

Sub Category [sc]$\in$ Business Application Platform, Raw Computing Platform, Web Hosting, Databases, Open Cloud Platform, Web Application Platform, Application Hosting, Storage, Networking and Infrastructure Service Management.

Cloud Services Mapping [xi] = yi

Learning Category [lc]$\in$ New Category [nc] Begin Extract queries (Customer Cloud Preferences) For each CSP List [xi] do          //CSP = Cloud Services Provider For each CSP Category [i] go If EQ = CSP Description [i]          //EQ = Extract Query Bind Service Sub Category [ij] = EQ Bind Cloud Services Ranking [xi] ∈ Service Main Category [mc] Bind Service Sub-Category [sc] ∈ Service Main Category [mc] Else CSM          //Cloud Services Mapping Function Cloud Services Mapping [xi] For each in Cloud Category [xi] Mapping Cloud Services [yi] End For If Service Sub-Category [ij] = match Then CSRA [xi] For each Service Sub-Category [ij]          //Cloud Services Ranking Else Learning Category [lc] ∋ [sc] Function Learning Category [lc] End If End For If threshold > Max Sim [lc] Then Bind CSRA [xi] ∈ Service Main Category [i] Bind Main Category [xi] ∈ Service Sub-Category [ij] Else If Threshold > Max Sim (nc) Then Bind Register New Category [nc] ∈ Service Sub-Category [ij] Bind Service Sub-Category [ij] ∈ Service Main Category [xi] Else Learning New Cloud Category (nc) Hold Learned Cloud Category (lc) End If