Offstage Objects and their Renovations in the Temporal Object System TOS

Abstract

TOS, the temporal object system proposed in4y5) maintains changes to both the structure and state of an object. Objects in TOS are referred to as temporal objects. In this paper we show how the aggregation of temporal objects in a family, i.e., collection of temporal objects with the same common knowledge, allows the construction of an offstage object. During its lifespan , an offstage object may go through changes due to the changes in its participant temporal objects. We refer to this as the renovation of an offstage object. Here, we discuss two types of renovations for such an object.

Modeling Historically mHealth Care Environments

“…A new temporal object can also be created from an existing temporal object as its extension, and this temporal object is referred to as an offstage object (Shah, Fotouhi, Grosky, Rana, & Vashishta, 1993). If an offstage is sharing knowledge of only one temporal object that is referred to a participant object, then this is analogous to simple inheritance in the class-based approach, and if an offstage object is sharing knowledge from more than one participant temporal objects, then this is similar to the concept of multiple inheritances in the class-based approach see (Shah, Fotouhi, Grosky, Rana, et al, 1993) for more details. The concept of the offstage object has already been used in the modelling of biological data (Idrees, Khan, & Shah, 2014).…”

Operators of the temporal object system and their implementation

“…4). The stage S k;a , is significant in the definition of the offstage, this stage is referred to as an offstage, and the temporal object TO a is referred to as a participant object (for more details of an offstage object and offstage see [20] TO a and the offstage object, respectively. Also, we are using ''period'' instead of ''comma'' to make the difference between the notations of a stage and an offstage object.…”

“…The fresh copy is shared by defining a new stage of the offstage object at a time instance. Details about renovation of offstage object can be seen in [9,20].…”

“…After any one of the type II or type III changes, it is necessary to reload a previous version of the database to retrieve any information from a previous version of a class structure. It is a desirable feature of CAD/CAM, CAC, and other advanced engineering database applications to keep history of changes to the class structures [20][21][22][23]. It helps in designing a new product by using previous products.…”

Tos

“…., (SRt n, STt n )} where, t i < t j ∀ 1 -i < j ≤ n and the ordered pair (SRt i, STt i ) is the i-th object of the temporal object which is constructed at the time instance t i with structure SRt i and state STt i . An i-th object of the TO is referred to as its i-th stage (Fotouhi, 1992a;Fotouhi, 1992b;Shah, 1992;Shah et. al., 1993) or i-th object.…”