libxslt1-dev - 1.1.34-4+deb11u1 main

XSLT is an XML language for defining transformations of XML files from
XML to some other arbitrary format, such as XML, HTML, plain text, etc.
using standard XSLT stylesheets. libxslt is a C library which
implements XSLT version 1.0.
.
This package contains the development files for libxslt.