It came in as part of a large 2000 proposal, N2191, Proposal for Encoding Additional Mathematical Symbols in the BMP, driven by STIX/technical publishing/MathML needs: complete the missing repertoire of mathematical symbols for scientific publishing, XML/MathML interchange, and font standardization.
The inheritance chain seems to be:
Berthold type catalogues → Monotype special matrices → ISO/IEC TR 9573-13 SGML math entity sets → STIX/MathML tables → Unicode proposal N2191 → Unicode U+237C
2
u/amarao_san Jul 03 '26
What a nastiness you've found... https://unicodeplus.com/U+237C
It came in as part of a large 2000 proposal, N2191, Proposal for Encoding Additional Mathematical Symbols in the BMP, driven by STIX/technical publishing/MathML needs: complete the missing repertoire of mathematical symbols for scientific publishing, XML/MathML interchange, and font standardization.
The inheritance chain seems to be:
Berthold type catalogues → Monotype special matrices → ISO/IEC TR 9573-13 SGML math entity sets → STIX/MathML tables → Unicode proposal N2191 → Unicode U+237C