Effortlessly Query Folder Attributes in Molecular Models

For molecular modelers working with complex datasets, efficiently querying and organizing hierarchical structures is a crucial aspect of their workflows. The folder attribute space in SAMSON’s Node Specification Language (NSL) provides a structured way to manage such challenges by querying folder-specific properties.

Why Folder Attributes Matter

When dealing with molecular systems, folders in SAMSON represent hierarchical containers that group nodes like atoms, chains, or molecules. Using folder attributes allows modelers to filter and interact with these structures in a highly targeted manner. This saves time and increases precision when analyzing molecular data, especially in large-scale projects.

Inherited and Folder-Specific Attributes

The folder attribute space combines inherited attributes from the general node attribute space and attributes specific to folders. This blend offers flexibility while staying intuitive to use.

Inherited Folder Attributes

Some important attributes inherited from node include:

  • visibilityFlag (f.vf): Adjusts folder visibility.
  • hidden (f.h): Checks whether a folder is hidden.
  • hasMaterial (f.hm): Determines if a folder has material content.

These attributes allow immediate control over common properties needed while managing visible or selected nodes in larger datasets.

Attributes Unique to Folders

The power of the folder attribute space lies in its folder-specific attributes tailored to model hierarchical molecular structures:

  • numberOfAtoms (f.nat): Query the folder for its atomic count. For example, use f.nat > 1000 to identify folders containing structures with more than 1000 atoms.
  • numberOfCarbons (f.nC): Filter structures based on the number of carbon atoms. Example: f.nC 10:50 matches folders with 10 to 50 carbon atoms.
  • numberOfResidues (f.nr): Pinpoint larger biomolecules by querying residue counts. Example: f.nr 100:200.
  • formalCharge (f.fc): Select folders with specific formal charge ranges, e.g., f.fc 0 matches neutral structures.

How to Start Using Folder Attributes

To leverage folder attributes, NSL expressions like the following can be input directly within SAMSON:

  • f.nat > 2000 – Filters folders with atom counts above 2000.
  • f.nC < 10 – Retrieves folders with fewer than 10 carbon atoms.
  • f.h – Lists all hidden folders.
  • f.nr 50:100 – Identifies folders with 50 to 100 residues.

This query framework allows for a flexible, interactive exploration of highly detailed molecular systems.

Building Efficient Workflows

Mastering folder attributes can drastically streamline your molecular design tasks. For example, you can:

  • Easily isolate datasets of interest within large structural hierarchies.
  • Automate the selection of structural groups or molecules based on properties like charge or atom type.
  • Ensure clean visibility and selection management for complex designs.

The folder attribute space is a powerful yet approachable tool, making it invaluable when working with highly granular molecular models. By integrating these attributes into your workflows, you can save significant time and achieve more accurate results.

To dive deeper into folder attributes, visit the official documentation.

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