diff --git a/luamml-structelemwriter.lua b/luamml-structelemwriter.lua
index d74513d..eb266a1 100644
--- a/luamml-structelemwriter.lua
+++ b/luamml-structelemwriter.lua
@@ -25,10 +25,10 @@ local attributes = setmetatable({}, {__index = function(t, k)
local attr_name = string.format('luamml_attr_%i', attribute_counter)
t[k] = attr_name
tex.runtoks(function()
- -- tex.sprint(string.format('\\tagpdfsetup{newattribute={%s}{/O/NSO/NS %i 0 R',
- -- attr_name, mathml_ns_obj or get_mathml_ns_obj()))
- tex.sprint(string.format('\\tagpdfsetup{newattribute={%s}{/O/MathML-3',
- attr_name))
+ tex.sprint(string.format('\\tagpdfsetup{newattribute={%s}{/O/NSO/NS %i 0 R',
+ attr_name, mathml_ns_obj or get_mathml_ns_obj()))
+ -- tex.sprint(string.format('\\tagpdfsetup{newattribute={%s}{/O/MathML-3',
+ -- attr_name))
tex.cprint(12, k)
tex.sprint'}}'
end)
diff --git a/testfiles-lua/test_struct.pvt b/testfiles-lua/test_struct.pvt
new file mode 100644
index 0000000..bfc1ae0
--- /dev/null
+++ b/testfiles-lua/test_struct.pvt
@@ -0,0 +1,56 @@
+\ExplSyntaxOn
+\sys_gset_rand_seed:n{1000}
+\ExplSyntaxOff
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{
+ uncompress,
+ pdfversion = 2.0,
+}
+\documentclass{article}
+\usepackage{tagpdf}
+\usepackage[structelem]{luamml-demo}
+\tagpdfsetup{
+ activate-all,
+ interwordspace=true,
+}
+
+\usepackage{unicode-math}
+
+\begin{document}
+\tagstructbegin{tag=Document}
+\LuaMMLTagAF{} {
+\[
+ \begin{pmatrix}
+ 1 & 0 & 0 \\
+ 0 & 1 & 0 \\
+ 0 & 0 & 1
+ \end{pmatrix}
+ =
+ \begin{cases}
+ 1 & $if $a=b\\
+ 2 & $else$
+ \end{cases}
+\]
+}
+\LuaMMLTagAF{} {
+\[
+ x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}.
+\]
+}
+\LuaMMLTagAF{} {
+\[
+ \sum_a\underline c\dot bc'
+\]
+}
+
+\LuaMMLTagAF{} {
+\begin{align}
+ abc&=def & e^{\mathrm{i}\pi}&=-1\\
+ \Big(1+2&=3\Big)\\
+ 5
+\end{align}
+}
+
+Es gilt \LuaMMLTagAF{}{$\sin(x)-\sin(x+2\pi)=0$}.
+\tagstructend
+\end{document}
diff --git a/testfiles-lua/test_struct.tpf b/testfiles-lua/test_struct.tpf
new file mode 100644
index 0000000..c772311
--- /dev/null
+++ b/testfiles-lua/test_struct.tpf
@@ -0,0 +1,1758 @@
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diff --git a/testfiles-lua/test_xml.mlr b/testfiles-lua/test_xml.mlr
new file mode 100644
index 0000000..00e5ff8
--- /dev/null
+++ b/testfiles-lua/test_xml.mlr
@@ -0,0 +1,229 @@
+
+
+
+
+
+
+
diff --git a/testfiles-lua/test_xml.mlt b/testfiles-lua/test_xml.mlt
new file mode 100644
index 0000000..a732ade
--- /dev/null
+++ b/testfiles-lua/test_xml.mlt
@@ -0,0 +1,53 @@
+\RequirePackage{pdfmanagement-testphase}
+\DeclareDocumentMetadata{
+ uncompress,
+ pdfversion = 2.0,
+}
+\documentclass{article}
+\usepackage[l3build]{luamml-demo}
+\usepackage{tagpdf}
+\tagpdfsetup{
+ activate-all,
+ interwordspace=true,
+}
+
+\usepackage{unicode-math}
+
+\begin{document}
+\tagstructbegin{tag=Document}
+\LuaMMLTagAF{} {
+\[
+ \begin{pmatrix}
+ 1 & 0 & 0 \\
+ 0 & 1 & 0 \\
+ 0 & 0 & 1
+ \end{pmatrix}
+ =
+ \begin{cases}
+ 1 & $if $a=b\\
+ 2 & $else$
+ \end{cases}
+\]
+}
+\LuaMMLTagAF{} {
+\[
+ x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}.
+\]
+}
+\LuaMMLTagAF{} {
+\[
+ \sum_a\underline c\dot bc'
+\]
+}
+
+\LuaMMLTagAF{} {
+\begin{align}
+ abc&=def & e^{\mathrm{i}\pi}&=-1\\
+ \Big(1+2&=3\Big)\\
+ 5
+\end{align}
+}
+
+Es gilt \LuaMMLTagAF{}{$\sin(x)-\sin(x+2\pi)=0$}.
+\tagstructend
+\end{document}