For molecular modelers managing large datasets, the ability to precisely define and query folders based on their attributes is invaluable. SAMSON’s Node Specification Language (NSL) offers powerful tools to filter and interact with hierarchical molecular structures through attributes. Among these, understanding folder attributes can streamline workflows significantly. In this post, we'll illustrate how to apply these attributes, including their short codes, possible values, and practical examples to help you reduce frustration in data navigation.
What are Folder Attributes?
Folder attributes are properties associated with molecular structure containers, or “folders.” These attributes allow users to match and manipulate specific folder nodes efficiently. For example, you can filter folders based on the number of atoms they contain, their visibility, or even their formal charge. This functionality is especially useful for working with complex molecular systems where manual examination of data would be impractical.
Inherited Attributes vs. Folder-Specific Attributes
In SAMSON's NSL, folder attributes fall into two categories: those inherited from the generic node attribute space (e.g., visibility and selection state) and attributes specific to folders.
Examples of Inherited Attributes
- Visibility: Use
f.vto target folders that are visible (true) or not (false). - Selection state: The
f.selectedattribute helps you filter selected folders, streamlining workflows such as exporting or analyzing specific structural elements.
Folder-Specific Attributes
Folder-specific attributes unlock an extra layer of precision for molecular modelers:
- Number of Atoms: The
f.natattribute allows you to filter folders based on the number of atoms they contain (e.g.,f.nat 100:200). - Number of Hydrogens: The
f.nHattribute simplifies hydrogen-specific filtering (e.g.,f.nH < 10). - Formal Charge: Use
f.fcto target folders with specific formal charges (e.g.,f.fc 6:8).
Practical Use Cases
When might these attributes help you?
- Data Filtering for Visualization: Imagine you are visualizing a complex structure but only need to focus on folders containing fewer than 200 atoms. Instead of sifting through folders manually, you can use
f.nat < 200. - Hydrogen-Specific Analysis: For tasks like analyzing hydrogen bonding networks, filter folders containing a specific range of hydrogen atoms using
f.nH 10:20. - Electrochemical Insights: To study charged systems, target folders with formal charges in a specific range using
f.fc. This is particularly useful when analyzing structures for reactivity or interaction potentials.
Why Should You Use These Attributes?
Folder attributes allow you to execute precise queries, automate routine tasks, and focus on what matters most in molecular design. For example, expressing queries succinctly—f.v instead of manually toggling visibility—is a time-saving upgrade for any molecular modeler.
Learn More
We've covered just a glimpse of what folder attributes can do for you. To dive deeper, including detailed examples of setting and retrieving attribute values, we recommend exploring the full documentation: Folder Attributes Documentation.
SAMSON and all SAMSON Extensions are free for non-commercial use. Download SAMSON today at samson-connect.net.