For molecular modelers working with SAMSON, mastering the Node Specification Language (NSL) can be a game-changer in navigating and optimizing projects. One critical component of NSL is the presentation attribute space, which deals with presentation nodes. This blog delves into the presentation attribute space, helping you get the most out of your modeling experience.
What are Presentation Attributes?
In SAMSON, the presentation attribute space (short name: pr) applies specifically to presentation nodes. These attributes allow modelers to control aspects such as visibility, naming, selection, and other display-related features. If you’ve ever struggled to organize or navigate complex molecular models, learning these attributes could save you precious time and streamline your workflow.
Key Attributes and Usage
Below, we explore some of the key presentation attributes, their roles, and practical applications:
hidden (pr.h)
The hidden attribute allows you to define whether a presentation node is hidden from view. Possible values are true (hidden) or false (visible). For example:
pr.h: Checks if the node is hidden.not pr.h: Ensures the node is not hidden.
name (pr.n)
The name attribute helps identify presentation nodes by strings. It is particularly useful for searching and filtering. Examples include:
pr.n "A": Matches nodes with the exact name A.pr.n "L*": Matches nodes starting with L.
visible (pr.v)
This attribute determines whether a node is visible. Possible values are true or false. Example usage:
pr.v: Checks if the node is visible.not pr.v: Ensures the node is not visible.
selectionFlag (pr.sf)
The selectionFlag attribute acts as a toggle for highlighting or marking nodes during the selection process. For instance:
pr.sf false: Deselects nodes.pr.sf: Checks if a node’s selection flag is active.
Putting It All Together
Imagine working on an intricate molecular model with hundreds of presentation nodes. By leveraging these attributes systematically, you can effortlessly organize nodes, toggle visibility, highlight specific groups, and save time in your modeling process. For example, you might use:
pr.vandnot pr.vto hide or show specific groups during presentations or analyses.- Attribute filtering with
pr.nto isolate specific nodes for modifications.
For more details, including possible values and examples for all presentation attributes, visit the official documentation page.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at https://www.samson-connect.net.