• Data model — structure of data and curve files
• File formats — native format and legacy formats
• Expressions — expression syntax and variables
• Indices & Loops — how Frida loops and cross-workspace arithmetic
• Commands — complete command listing
• Built-in functions — mathematical functions
• Curves & fitting — defining and fitting curves
• External curves — curves computed by external programs
• Overwrite or duplicate — how the ! suffix controls workspace behaviour