Release notes

What changed in each version of the libraries.

PackageAll Permito Inverse Summand Surjection Integral Cosine Derivative Gradient Sigmoid Witness Logarithm Vector

Release5 October 2026

Summand 0.1.0 released

Validate XRechnung, ZUGFeRD and Factur-X e-invoices against the official EN 16931 and XRechnung rules in pure TypeScript: in Node, the browser and at the edge, without Java.

Summand