If you’re delving into molecular modeling with SAMSON, the integrative molecular design platform, mastering the Node Specification Language (NSL) can save you time and improve precision. One particular aspect worth exploring is file attributes, which play a critical role in specifying and managing file-related nodes in your projects. In this post, we’ll take you through the essentials of file attributes in NSL, empowering you to streamline your workflows.
Understanding the Basics of File Attributes
File attributes are part of the file attribute space in NSL (with the short name fi). This attribute space is specifically designed to match file nodes and inherits attributes from the general node attribute space. Knowing how to use these attributes can help you organize and query your data more efficiently.
File attributes allow you to:
- Assign and query node details such as file names.
- Check if files are selected for further processing.
- Set and monitor selection flags for finer control over node behaviors.
Key File Attributes
Three main attributes are crucial when working with file nodes in SAMSON:
1. name
The name attribute represents the file node’s name. It accepts string values enclosed in quotes. You can use it to query or filter file nodes based on matching patterns:
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fi.n "A"</code> <br><code>fi.n "L*" |
For instance, you can search for files with specific names or those starting with certain characters, making it easier to locate the nodes you need.
2. selected
The selected attribute lets you check if a file node is selected. Possible values include true or false:
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fi.selected</code> <br><code>not fi.selected |
This is useful when you want to process only selected nodes in a dataset or filter out unselected ones.
3. selectionFlag
The selectionFlag attribute, with the short name sf, allows you to set or query whether a file node’s selection flag has been toggled:
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fi.sf false</code> <br><code>fi.sf |
It provides a more granular control mechanism compared to the general selected attribute.
Applying File Attributes
By mastering the use of name, selected, and selectionFlag, you can efficiently manage file nodes in your molecular modeling projects. For example, with just a few expressions, you can filter nodes based on naming patterns, process only selected nodes, or toggle selection flags for batch operations. These capabilities ensure a more streamlined and precise modeling experience.
Learn More
For a detailed reference on file attributes in NSL, visit the documentation page at this link. You’ll find further examples, attribute explanations, and related topics to enhance your understanding and ease of use.
SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at https://www.samson-connect.net.