For molecular modelers, efficiently managing and visualizing data within a molecular design platform can significantly impact workflow and productivity. SAMSON, the integrative molecular design platform, provides a feature known as Presentation Attributes in its Node Specification Language (NSL) to make this process easier and more streamlined. But what exactly are these attributes, and how can they help you?
What Are Presentation Attributes?
In SAMSON, Presentation Attributes allow users to control and customize how presentation nodes are displayed. These attributes belong to the presentation attribute space (with the short name pr), a namespace used exclusively for presentation-related nodes. By mastering these attributes, you can tailor your model view, choose which parts are visible or hidden, and simplify the complexity of your workspace.
Key Attributes You Can Use
The following are some of the main Presentation Attributes, along with their benefits and examples:
- Hidden (
h): Use this attribute to show or hide specific presentation nodes. For example,pr.hhides a node, whilenot pr.hensures it is visible. - Name (
n): Assign or filter nodes based on their names using strings enclosed in quotes. For example, you can match nodes named “A” using the expressionpr.n "A". - Selected: Check or target presentation nodes that are currently selected. For example,
pr.selectedfinds all selected nodes, andnot pr.selecteddoes the opposite. - Selection Flag (
sf): This attribute specifies whether a node is flagged for selection. Example expressions includepr.sfandpr.sf false. - Visibility Flag (
vf): This indicates whether nodes are flagged for visibility. Similar to selection flags, you can hide or show flagged nodes using expressions likepr.vforpr.vf false. - Visible (
v): Simplify your workspace by showing only the nodes you want to work on with expressions likepr.vor the inversenot pr.v.
Why Do These Attributes Matter?
Molecular modeling often involves handling large numbers of nodes and data elements. Without a clear structure or way to filter your workspace, you can easily become overwhelmed. With Presentation Attributes, you can focus specifically on nodes that are relevant to your current task (e.g., analyzing a molecular sub-group), declutter your workspace by hiding unnecessary elements, and streamline your visibility settings.
Let’s take an example: Suppose you’re working with a model that has hundreds of presentation nodes. You’re interested in analyzing only those marked as visible. By using the expression pr.v, you quickly isolate these nodes without manually scrolling through your workspace. Similarly, if you want to temporarily hide some graphic elements to see underlying structures, all you need is pr.h or pr.vf false.
Conclusion
Learning to use Presentation Attributes in SAMSON’s Node Specification Language is more than just a technical skill—it’s a way to enhance how you interact with molecular models. The ability to hide, select, or prioritize nodes effectively can save you time, reduce clutter, and help you focus on what truly matters during your research or design process.
To dive deeper into Presentation Attributes and explore more examples, visit the official documentation page: https://documentation.samson-connect.net/users/latest/nsl/presentation/.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON at https://www.samson-connect.net.