Managing data across a semantic data view and a presentation data view may be provided. A semantic model may be represented in a semantic data view and a presentation model may be represented in a presentation data view. The presentation model may correspond to a graphical representation of the semantic model. In addition, a command may be received directed toward the semantic data view or the presentation data view. The semantic model and the presentation model may be operated upon according to the received command. Furthermore, the semantic model represented in the semantic data view and the presentation model represented in the presentation data view may be updated in response to operating on the semantic model and the presentation model according to the received command. The semantic model and the presentation model may be simultaneously maintained in a volatile memory in a computer.