Demystifying File Attributes in SAMSON’s Node Specification Language

Molecular modeling is a complex endeavor where even minor inefficiencies in managing files and data can become bottlenecks. SAMSON, the integrative molecular design platform, addresses these challenges with its Node Specification Language (NSL), which streamlines how users interact with files at a granular level. In this blog post, we will focus on the file attribute space in NSL—a powerful toolkit for working with file nodes.

What Are File Attributes in NSL?

The file attribute space, also referred to by its short name fi, is a set of attributes associated with file nodes in SAMSON. These attributes allow molecular modelers to specify, retrieve, and interact with the properties of file nodes efficiently. File attributes inherit traits from the node attribute space, making them consistent with SAMSON’s overall data management framework.

Breaking Down File Attributes

Here’s an overview of some key file attributes in NSL:

  • name (n): This attribute represents the name of the file node. It uses strings enclosed in quotes. For example:
    • fi.n "MyFile"
    • fi.n "Experiment*" (matches names starting with “Experiment”)
  • selected: This attribute indicates whether a file node is selected. Possible values are true or false. Examples of expressions include:
    • fi.selected (selects all nodes that are selected)
    • not fi.selected (excludes selected nodes)

    Note that selected does not have a short name in the file attribute space.

  • selectionFlag (sf): This attribute works similarly to selected and tracks whether a file node is flagged for selection. Possible expressions include:
    • fi.sf false (unflag nodes for selection)
    • fi.sf (select all flagged nodes)

Key Benefits for Molecular Modelers

Leveraging these file attributes comes with significant advantages for molecular modelers:

  • Streamlined Workflow: The short names like n and sf reduce redundancy and speed up specification processes.
  • Powerful Filtering: Expressions allow users to efficiently filter and manipulate file nodes, even when dealing with large datasets in complex molecular projects.
  • Consistency: By inheriting some aspects from the broader node attribute space, the system maintains a consistent logic, reducing the learning curve for new users.

Examples in Practice

Imagine you are working on a molecular modeling project with hundreds of files. You might want to:

  • Quickly find all files starting with a specific prefix: fi.n "Sim*".
  • Select only files flagged for further review: fi.sf.
  • Unflag files already reviewed: fi.sf false.
  • View only unselected files: not fi.selected.

Mastering these expressions can save significant time and effort.

For a comprehensive breakdown of file attributes, please visit the official documentation: https://documentation.samson-connect.net/users/latest/nsl/file/.

SAMSON and all SAMSON Extensions are free for non-commercial use. Download SAMSON today at https://www.samson-connect.net.

Comments are closed.