Hi AK,
Topology is a visual representation of how the network is connected. So the field that would be included would be model handle, model class and model type to represent the model, x , y coordinates to represent the location, topology model name string to see how many containers deep the model is located and the relations and associations of the model to see how it is connected to the other model.
Security String isn´t used in topology except Security Strings will always roll down, meaning the child objects will inherit the parents security strings.
The reporting database does have some information such as model information and containers but these are used more for reporting purposes for assets and availability and will not contain topology information.
We do publish the schema for SRMDBAPI so you can see what is included but we do not include specific topology information such as relations, associations or x,y coordinates.
Best regards,
Glenn