When working with molecular modeling software like SAMSON, the ability to specify and manipulate file-level attributes can significantly streamline workflows. But what exactly are file attributes in the context of SAMSON’s Node Specification Language (NSL), and how can they enhance your molecular modeling efficiency?
What Are File Attributes?
File attributes in NSL define properties specific to file nodes. These attributes belong to the file attribute space (often abbreviated as fi). They allow users to identify and manipulate file nodes by name, selection status, or custom selection flags. This can be especially useful when managing large datasets or multiple files within a project.
In SAMSON, file attributes build upon general node attributes and come with their own extended functionalities. They include:
- Name – The name of the file node, which can be filtered using specific patterns.
- Selected – A flag to check whether a file is currently selected.
- Selection Flag – A custom flag that can further refine selection behavior.
Practical Examples of Using File Attributes
The NSL syntax makes working with file attributes both flexible and powerful. Let's explore some practical scenarios where these attributes shine:
1. Searching for Files by Name
If you have a library of files and want to locate files based on their names, you can use the name attribute. Here are some examples:
fi.n "A": This expression matches files with the exact name “A”.fi.n "L*": This expression matches all files with names starting with “L”.
These patterns are particularly helpful when you're looking for specific files in complex projects.
2. Checking Selection Status
The selected attribute is perfect for identifying files that are currently highlighted or in focus. For instance:
fi.selected: Returns true for all selected files.not fi.selected: Filters files that are not selected.
3. Using Custom Selection Flags
Custom selection flags give you control over how selections are managed. With the selectionFlag (short name: sf), you can define or query custom states:
fi.sf false: Matches files for which the custom selection flag is set to false.fi.sf: Matches files where the custom selection flag is true.
These capabilities can help you organize and manipulate large datasets more effectively.
When to Use File Attributes in Molecular Modeling
File attributes are invaluable for molecular modelers working on complex projects. Whether you're organizing input/output files, refining data sets, or simply navigating through your project, mastering these attributes can reduce manual tasks and eliminate room for error.
Learn More
Want to dive deeper into file attributes? Visit the original documentation at https://documentation.samson-connect.net/users/latest/nsl/file/ to explore further.
*Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can download and start using them from https://www.samson-connect.net.