Xerces-C++ might be a bit more popular than pugixml. We know about 1 link to it since March 2021 and only 1 link to pugixml. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I installed pugixml via brew which uses this formula. Source: over 2 years ago
A quick search turned up https://www.w3.org/wiki/XML_Schema_software - in particular https://xerces.apache.org/xerces-c/ might meet your needs. Source: over 2 years ago
RapidXML - A very fast, stable, and small XML DOM-parser written in C++. It is aimed primarily for embedded environments, computer games or any other applications where available memory or CPU processing power comes at a premium.
Unimus - Unimus is a Network Automation and Configuration management (NCM) solution designed for fast deployment network-wide and ease of use. Unimus does not require learning any abstraction or templating languages, and does not require any coding skills.