Molecular modelers working with complex data structures often face challenges in efficiently targeting and manipulating specific file nodes. This is where SAMSON’s Node Specification Language (NSL) proves to be essential. By harnessing the power of file attributes within NSL, users can streamline workflows, improve accuracy, and save time when dealing with large datasets.
In this blog post, we’ll dive into the ‘file’ attribute space (short form: fi), discuss its key attributes, and show practical examples to help you become more proficient in using SAMSON’s NSL for file manipulation.
What are File Attributes in NSL?
File attributes correspond exclusively to file nodes within SAMSON. They are accessed using the fi prefix and inherit several attributes from the generic node attribute space. These attributes can help you pinpoint file nodes and apply operations to them effectively.
Exploring Key File Attributes
1. name
This attribute specifies the name of the file node. It allows you to target files based on their names using pattern matching with wildcards. Here are a few examples:
fi.n "A"– Targets file nodes named “A”.fi.n "L*"– Targets file nodes with names starting with “L”.
The name attribute inherits its behavior from node.name.
2. selected
This attribute determines whether a file node is marked as selected. It can take the values true or false. Examples include:
fi.selected– Targets file nodes that are selected.not fi.selected– Targets file nodes that are not selected.
Unlike the generic node attribute, selected in file nodes does not use a short name like s. More details are available here.
3. selectionFlag
The selectionFlag attribute acts as a boolean flag (true or false). It is particularly useful to mark or unmark specific files programmatically. For example:
fi.sf false– Targets file nodes with a selection flag set tofalse.fi.sf– Targets all file nodes with a selection flag set totrue.
The selectionFlag attribute inherits its behavior from node.selectionFlag.
Why These Attributes Matter
For molecular modelers working with many interconnected data files, these attributes offer enhanced control over dataset selection and processing. Whether you’re filtering out specific files based on naming conventions, isolating selected files for further editing, or flagging files as part of a workflow, NSL’s file attributes provide the flexibility and precision needed for efficient molecular modeling tasks.
Learn More
To dive deeper into file attributes and NSL, visit the official documentation page at SAMSON NSL File Attributes.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at SAMSON-Connect.net.