Efficient molecular modeling requires the ability to easily query, classify, and manipulate large datasets of nodes and materials. This process can be tedious without robust tools to handle data attributes and their relationships. That’s where the property model attributes in SAMSON come in. These attributes offer a structured, intuitive, and powerful way to filter and interact with your property model nodes using the Node Specification Language (NSL). Let’s explore how this can help you tackle modeling challenges more efficiently.
What are Property Model Attributes?
The property model attributes belong to the propertyModel attribute space (short name: pm) and are specifically tailored to property model nodes. They allow molecular modelers to manage, analyze, and design systems by using attribute names, short names, logical operators, and example expressions. Here’s what makes them so helpful:
- They provide important details about nodes, such as
visibility,name, andselection. - They enable the classification of nodes based on material ownership or presence (e.g.,
hasMaterial,ownsMaterial). - They support boolean logic, making it simple to filter and organize data.
Key Attributes for Molecular Modelers
Let’s take a closer look at the most commonly used attributes:
| Attribute Name | Description | Example Query |
|---|---|---|
hasMaterial (hm) |
Determines if a node has material associated with it. | pm.hm or not pm.hm |
hidden (h) |
Filters nodes based on whether they are hidden. | not pm.h to find visible nodes. |
name (n) |
Matches nodes by name using string operators. | pm.n "A" or pm.n "L*" for patterns. |
ownsMaterial (om) |
Checks ownership of material by the node. | pm.om |
visible (v) |
Specifies whether the node is visible in the view. | pm.v or not pm.v |
Each of these attributes enhances your ability to identify exactly the nodes you’re targeting and ensures your commands are precise and effective.
Practical Example
Imagine you’re working on a complex molecular design with hundreds of nodes and materials, and you want to isolate nodes that have material but are not currently visible on the screen. Using the attributes above, you can achieve this with the simple query:
|
1 2 3 |
pm.hm and not pm.v |
This query filters out all nodes that both have material and are invisible, instantly allowing you to focus on the relevant part of your design. This capability makes SAMSON’s property model attributes invaluable when managing large datasets.
What About Inherited Attributes?
One of the key advantages of property model attributes is their inheritance from the general node attribute space. This includes attributes like node.hasMaterial, node.hidden, and node.name, among others. However, inherited attributes are contextualized under the narrowed space of the propertyModel, making them even more relevant and targeted for property model nodes.
To see the full set of attributes and dive deeper into their usage, you can explore SAMSON’s documentation page on property model attributes.
Learn more about property model attributes here: SAMSON Documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at SAMSON Connect.