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Orbit Object List
The Orbit Object List (.ool) is a file that contains a set of objects. This set of objects can consist of objects from different models and even different datasets.
Structure
A text file that lists object references: the identification of dataset, model and object (ID's). When opening an object list, the user must take care that the required datasets are available. Object List files (*.ool: Orbit Object List) do not store objects, but only their references
Reasons to use
- An .ool file bundles your choice of objects into a single file for easy and fast recovery
- Object lists would best be used for temporary use only since you might loose exact object references when modifying the data: e.g. when deleting objects and saving the modified dataset, the object ID's might be different next time you open it, as some storage formats cannot withhold an object ID.
- Using the list-comparison and merging tools in e.g. the Find and Query windows, it is possible to compare the object lists that were prepared earlier and make new lists or datasets from there on.
Create and update
The Orbit Object List can be created in three ways:
- In the Object Inspector.
- In the Find Objects Tool.
- In the Query Objects Tool.
The .ool file is only supported by these 3 functions.
It can be created, opened, saved and saved as another filename in the Open & Save Operations.
The Open & Save Operations are the same for all 3 functions, only the gathering of the objects is different (by selection, by searching or by querying).