# Model Page

This page shows the contents of a SDAI model. The name of a model, repository to which it belongs to, underlying schema name, change date, modified flag and current access is given in the upper part of the page. The modification date automatically changes when you edit this model. The modified flag shows if the model is being modified at the current time. From the selection of two access radio buttons r/o (read only) and r/w (read write) you can see current access to this model. You can also change the access type by selecting one of them, but remember that access changes automatically when you try to edit data. There are three sub tabs: Extents, Schema Instances and Mapping. The Extents and Mapping tabs are the same as in schema instance page, but data is taken just only from this model.

## Extents

The contents of all associated models is shown in this window. There is a filtering line at the top where you can filter the table below. 'Populated' will show all the entities data types which have more than zero entity data values (column '#values'). 'All folders' will show all entity data types. And 'Exact folders' filter just these entity data types which have any instance (column 'instances').

### Table

Table have four columns: Name, Schema, #values and #instances. Name column contains names of entity data types (name of entity definition). The schema column contains schema name of an entity data type. #values column shows how many entity data values are there for this entity data type and the #instances show how many instances have this entity data type. If there is an empty cell instead of number in the '#values' column that means that such entity data type value can not exist (the entity data type is complex). If there is an empty cell instead of a number in '#instances' column that means that such instance can not exist (the entity data type is abstract).
The total number of entity data types, complex entity data types and instances is shown at the end .

## Schema Instances

All the names of schema instances to which this model belongs are listed in this page. This is just informational page. It is not possible to add any model to schemes here. If you want to do so you need go to schema instance page and add the model here.

## Mapping

All AIM data in ARM context (All ARM entity data types) are listed in the page above. If there is no ARM schema for this underlying schema, than 'No mapping data' will appear instead of a table. There are two filtering radio buttons at the top. The first one 'Populated folders' will list the ARM entity data types which have any available AIM instance. The second one - 'All folders', lists all available ARM entity data types.

### Table

The table consists of three columns: 'Source (ARM)', 'Target (AIM)' and '#'. In the first column the names of ARM data types are presented. The names of AIM entity data type are presented in the second column. You must remember that one ARM entity data type can be mapped to several AIM entity data types. So there is a relation many to many.The third column shows number of instances, which are available for the pair of ARM and AIM entity data types.