Nke a na-emepụta eriri igwe ọkụ ọkụ na-emepụta "villa keel".Igwe ọkụ nchara na-akpụpụta igwe na-agụ usoro ihe mejupụtara keel zuru oke nke sọftụ Vertex BD sitere na diski U, wee gbakọta ha ọnụ ka ha wee mepụta oghere nchara nchara zuru oke.
Akara mmepụta a abawanyela ngwa, ọkachasị gụnyere: ụlọ ndị mmadụ, ụlọ ndị otu ezinụlọ, ụlọ oriri na ọṅụṅụ awara awara, ụlọ oriri na ọṅụṅụ ụgbọ ala;Ụlọ ihe arụrụ arụ ọkụ nke nwere obere mgbidi kpụrụ akpụ dị ka ụlọ, ụlọ modular, ụlọ azụmahịa na ụlọ ọrụ mmepụta ihe, yana ụlọ maka enyemaka mberede na ọdachi, enyemaka ọdachi, na ụlọ mwughachi mgbe ọdachi gasịrị.