As far I know, C++ version was ramped up due to glibmm requirements.
As version 5.x does not depend on glibmm anymore (C++17), may I suppose it works with C++11?

Actually, I downloaded 5.0.1 tarball, built it and even did make check and everything seems to be ok. But can you confirm it?

libxml++ has been moved to GitHub, and more parallel-installable versions
have been released, but jhbuild still pulls libxml++ from GitLab.
Would this be a suitable update of jhbuild/modulesets/gnome-world.modules?

  <autotools id="libxmlplusplus-3">
    <branch repo="github.com" checkoutdir="libxmlplusplus-3"
            module="libxmlplusplus/libxmlplusplus.git" revision="libxml++-3-2"/>
    <dependencies>
      <dep package="libxml2"/>
      <dep package="glibmm-2.4"/>
    </dependencies>
  </autotools>

  <autotools id="libxmlplusplus-4">
    <branch repo="github.com" checkoutdir="libxmlplusplus-4"
            module="libxmlplusplus/libxmlplusplus.git" revision="libxml++-4-0"/>
    <dependencies>
      <dep package="libxml2"/>
      <dep package="glibmm"/>
    </dependencies>
  </autotools>

  <autotools id="libxmlplusplus">
    <branch repo="github.com" checkoutdir="libxmlplusplus"
            module="libxmlplusplus/libxmlplusplus.git"/>
    <dependencies>
      <dep package="libxml2"/>
    </dependencies>
  </autotools>

I haven't tested it. I can do that, and update gnome-world.modules.

Forgive me my ignorance, but why starting two ABI incompatible release series within the hour? When should which release series be used?

Thanks!

The ABI name of the unstable glibmm has been increased once again.
The libxml++-4-0 branch should be updated with the attached patch.

0001-Use-glibmm-2.66-instead-of-glibmm-2.64.txt

I don't seem to have write permission to github.com/libxmlplusplus/libxmlplusplus.

ERROR: Permission to libxmlplusplus/libxmlplusplus.git denied to kjellahl.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

@murraycu Can you push the patch or give me write permission, please.

It's not important that I have write permission. I don't expect to work with
libxml++ in the future. I've enough to do with gtkmm and its dependencies.

The changes that will add Meson support in the libxml++-4-0 and master branches
will be very similar to the changes in the libxml++-3-2 branch. I plan to
push these changes directly, without writing PRs.

@fanc999 When I've pushed these changes, it would be fine if you can check if
more changes are necessary for MSVC builds.

#include <libxml/HTMLparser.h>
#include <libxml++/libxml++.h>
#include <string>

int
main(void)
{
        std::string text = "BLABLA";
        xmlDoc* doc = htmlReadDoc((xmlChar*)text.c_str(), NULL, NULL, HTML_PARSE_RECOVER | HTML_PARSE_NOERROR | HTML_PARSE_NOWARNING);
        // Encapsulate raw libxml document in a libxml++ wrapper
        xmlpp::Document doc1(doc);
        return 0;
}

compile as:
g++ -o test test.cpp $(pkg-config --cflags libxml++-5.0) $(pkg-config --libs libxml++-5.0)

./test segfaults

Both links to the reference and the manual on the github.io page are broken or down

why I have 2 children with <ISSN IssnType="Electronic">1749-5024</ISSN>? One is ISSN Element node, one is text node with text 1749-5024. This is kind of strange. Normally we would expect it is a Single node has both attributes and text. Or a Element node contain a text node. It seems all xml element has 2 nodes so far, why cannot we just make all nodes has a text member and the text can be optional? then we can do for loop:

for (auto const i: pNode->get_children())
{
   std::cout << i->text << "\n";
}

Or at least make the text node be the child of the ISSN, then we can use get_first_child_text() on it.

some thing like following:

auto node = pNode->get_children()[2];
some_doc.get_root_node().add_node(node);

Is this possible in libxml++?

Can someone please add detail guide on how to install this in visual studio 22?

Not many people use meson, I don't understand why build is focused on it and it's completely useless guide for VC users.
The current VC guide just says, install libxml2, link it and run nmake.
It does not work.

I installed libxml2 via vcpkg, even added package include and lib directories to VC path (even though vcpkg should already be integrating) and I am getting message:

..\libxml++\attribute.cc: fatal error C1083: Cannot open include file: 'msvc_recommended_pragmas.h': No such file or directory

I have virtually no idea where this header is. Some search indicates that it is glibmm dependency, I installed that as well, but still getting the error.
Can someone who installed this before try installing libxml2 via vcpkg make this work and expalin me how.