Content MathML read through ctop.xsl; amssymb symbols in LaTeX

AGENTS.md

@@ -55,7 +55,8 @@ init-only record: `Display`, `Strict`, `PreserveFormatting`, `LaTeXFlavor` stand
   `menclose notation="bottom"`. The default intents (`:fenced`, `:function`, `absolute-value`,
   `binomial-coefficient`, the matrices...) are not kept, since they would make an equation differ by how it was
   written (`\binom`, `⒞`, `(¦)`); `DefaultIntents.Restore` infers them again from the structure for the LaTeX and
-  UnicodeMath writers.
+  UnicodeMath writers. Content MathML of the source (`apply`, `ci`, `cn`..., outside the annotations) is first rewritten
+  as presentation MathML by `ctop.xsl` (David Carlisle's, see `NOTICE`), keeping the presentation MathML around it.
 - `Internal/Omml/`: OMML ↔ MathML with the XSLT 1.0 stylesheets of `Resources/` (from the TEI Stylesheets, see
   `NOTICE`), run with `XslCompiledTransform`. OMML is written as Word writes it (plain letters with `m:sty`/`m:scr`,
   underbars as `m:bar`), and an upright word of OMML (`max`) is read as one identifier.

NOTICE

@@ -183,6 +183,38 @@ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+----------------------------------------------------------------------------
+src/SharpEquations/Resources/ctop.xsl
+tests/data/contentmathml/ctop-*.mml
+
+From https://github.com/davidcarlisle/web-xslt (ctop/ctop.xsl), the XSLT 1.0
+stylesheet of Content MathML to presentation MathML, and its test equations
+(ctop/tests/ctopxslt.html). The web-xslt collection is distributed under the MIT
+licence; ctop.xsl also under the W3C Software Notice and License, Apache 2,
+MPL 1.1 or MPL 2.0. SharpEquations uses them under the MIT licence, the stylesheet
+modified as described in its header:
+
+Copyright David Carlisle 2001, 2002, 2008, 2009, 2013.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
 ----------------------------------------------------------------------------
 tests/data/latex/latex2mathml-*.json
 
@@ -238,3 +270,33 @@ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------------
+src/SharpEquations/Internal/LaTeX/Mhchem.cs
+tests/data/latex/treeblood-mhchem.json
+
+The rules of mhchem's \ce in Mhchem.cs follow mhchem.go of https://github.com/Wyatt915/treeblood,
+rewritten in C# to write LaTeX rather than MathML; the test cases are those of its test/TESTCASES.yaml:
+
+MIT License
+
+Copyright (c) 2024 Wyatt Sheffield
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

README.md

@@ -19,7 +19,7 @@ format) and LaTeX, in .NET, with MathML as the common representation.
 
 | Format | Read | Write |
 |---|---|---|
-| MathML | ✓ | ✓ |
+| MathML (presentation; Content MathML is read as the presentation it is written as) | ✓ | ✓ |
 | OMML (Office Math Markup Language, the equations of `.docx`) | ✓ | ✓ |
 | MTEF (MathType, Equation Editor 3.0) | ✓ | |
 | UnicodeMath | ✓ | ✓ |

docs/ARCHITECTURE.md

@@ -135,6 +135,12 @@ also regroups an n-ary operation or a function application that normalization fl
 ### MathML (`Internal/MathML/`)
 
 `ParseXml` reads the XML with DTDs prohibited and no resolver (no external entities), the undeclared prefixes `mml:`, `m:` and `w:` known; in strict mode `Validate` accepts presentation MathML only.
+Content MathML (`<apply><plus/><ci>x</ci><cn>1</cn></apply>`), alone or inside presentation MathML, is rewritten
+first as the presentation MathML it is written as, by `ctop.xsl` (David Carlisle's stylesheet; the changes made
+to it are in its header): the white space between the elements and around the text
+of `ci` and `cn` goes before, and the limits it leaves empty (an integral without bounds) after. The Content MathML of
+an `annotation-xml` is left alone, and a `semantics` whose first child is Content MathML is read from its
+`MathML-Presentation` annotation when it has one. `tests/data/contentmathml` holds the test equations of ctop.
 `MathMLSerializer` writes the normalized MathML as it is.
 
 ### OMML (`Internal/Omml/`)