Understanding Note Attributes in SAMSON: Hidden, Selected, and More

Efficient molecular modeling often hinges on effective data organization and filtering. Whether you’re visualizing complex systems or refining molecular designs, the ability to toggle elements like visibility or apply filters to specific nodes can save you significant time and effort. That’s where SAMSON’s Note attributes feature comes into play.

Note attributes are part of SAMSON’s Node Specification Language (NSL), which empowers users to define and query node properties with precision. This blog explores how note attributes, found within the nt attribute space, can significantly enhance your modeling experience by allowing better clarity and control of note nodes in your projects.

What Are Note Attributes?

Note attributes specifically target note nodes—nodes designed to contain useful annotations and metadata about your molecular project. These attributes are inherited from the more general node attribute space, but they apply exclusively to note nodes, making them highly targeted and useful for annotation and filtering purposes.

Let’s delve into the most commonly used note attributes:

Hidden (hidden / h)

This attribute determines the visibility status of a note node. You can set it to true or false. For instance:

  • nt.h will return nodes with the hidden attribute set to true.
  • not nt.h will find all nodes that are not hidden.

Name (name / n)

If your notes contain specific keywords or identifiers, you can search for them by their names. Use strings in quotes to match names:

  • nt.n "A" retrieves nodes with the name “A”.
  • nt.n "L*" finds nodes with names starting with “L”.

Selected (selected)

Unassociated with a short name in this context, selected indicates whether a node is currently selected in the interface:

  • nt.selected: Targets selected nodes.
  • not nt.selected: Targets nodes that are not selected.

Selection Flag (selectionFlag / sf)

The selectionFlag is another attribute to track or define nodes for specific selections, useful for advanced group queries. Examples include:

  • nt.sf false: Finds nodes without the selection flag.
  • nt.sf: Finds nodes with the flag enabled.

Visibility Flag (visibilityFlag / vf)

Specifically designed for rendering purposes, this attribute allows control over whether a node should be displayed.

  • nt.vf false: Targets nodes not flagged for visibility.
  • nt.vf: Targets visible nodes flagged for rendering.

Visible (visible / v)

Similar to hidden, the visible attribute directly determines if the node should appear:

  • nt.v: Targets visible nodes.
  • not nt.v: Excludes visible nodes from the results.

Practical Applications

So why are these attributes particularly useful for molecular modelers?

  • Data Filtering: Isolate nodes containing specific information, such as experimental conditions or modeling parameters.
  • Project Organization: Use attributes like name and selected to locate and organize specific annotations quickly.
  • Efficient Visualization: Quickly toggle visibility and focus on relevant parts of a molecular structure.
  • Scripting Automation: Integrate these attributes into automated workflows to save time and reduce manual intervention.

Note that while note attributes can be used independently, combining multiple attributes in queries offers the most efficiency and flexibility. For example, a query such as nt.vf not nt.selected will identify all non-selected nodes flagged for rendering.

To truly master these features, it helps to experiment directly with the NSL and dive deeper into the official documentation for edge cases and advanced tips to optimize your workflows.

Learn more about note attributes and how they can enhance your work at this detailed documentation page.

SAMSON and all SAMSON Extensions are free for non-commercial use. Get started today by downloading SAMSON from www.samson-connect.net.

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