Understanding File Attributes in SAMSON’s Node Specification Language

As a molecular modeler, managing complex data with precision is integral to your work. When working within the SAMSON molecular design platform, knowing how to effectively utilize file attributes in the Node Specification Language (NSL) can save time, reduce errors, and streamline the workflow. This blog post dives into file attribute functionality within SAMSON’s NSL, covering key essentials like attribute names, use cases, and practical examples.

What Are File Attributes?

File attributes, as defined within the file attribute space (short name: fi), are used to target and manipulate file nodes. These attributes allow users to filter and work with file-specific properties efficiently. The distinct advantage of NSL is its versatility in combining these attributes to form logical instructions for molecular modeling tasks.

Core File Attributes

Three primary attributes belong to the file attribute space:

• name (n): This represents the names of file nodes. The value must be a string enclosed in quotes (e.g., "A", "L*"). For example, the query fi.n "A" would identify all file nodes named “A,” while fi.n "L*" would match file nodes whose names begin with “L.”
• selected: This attribute checks whether a file node is selected. Its possible values are true or false. For instance, fi.selected would identify selected file nodes whereas not fi.selected would exclude them.
• selectionFlag (sf): This indicates a flag linked to selection logic. It also accepts true or false as values. For example, fi.sf false would let you filter file nodes without a specific selection flag.

How Does This Help?

The power of these file attributes lies in their ability to precisely filter and act upon specific subsets of data from large modeling scenarios. Whether naming conventions are critical in a project, or you need to focus on selected nodes quickly, these attributes prevent manual errors and ensure your focus is always on meaningful data.

Examples in Action

Let’s look at practical examples:

Conclusion

File attributes within SAMSON’s NSL enhance precision and control in molecular modeling. Whether it’s managing node names, refining selection logic, or organizing file-specific tasks, these attributes are indispensable for efficient workflows.

To dive deeper into file attributes and other aspects of the Node Specification Language, visit the documentation page.

Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON at https://www.samson-connect.net.