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## Do we want an extra mrow within a math tag to hold semantic information?
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Consider the following example:
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Original MathML:
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```html
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<math>
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<mi>a</mi>
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<mo>+</mo>
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<mi>b</mi>
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<mo>+</mo>
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<mi>c</mi>
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</math>
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```
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Version 1 of semantically enriched MathML:
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```html
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<math>
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<mrow type="infixop" role="addition" id="5" content="1,3" children="0,2,4">
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<mi type="identifier" role="latinletter" id="0" parent="5">a</mi>
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<mo type="operator" role="addition" id="1" operator="infixop,+" parent="5">+</mo>
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<mi type="identifier" role="latinletter" id="2" parent="5">b</mi>
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<mo type="operator" role="addition" id="3" operator="infixop,+" parent="5">+</mo>
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<mi type="identifier" role="latinletter" id="4" parent="5">c</mi>
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</mrow>
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</math>
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```
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Version 2 of semantically enriched MathML:
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```html
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<math semantic-type="infixop" semantic-role="addition" semantic-id="5" semantic-children="0,2,4" semantic-content="1,3">
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<mi semantic-type="identifier" semantic-role="latinletter" semantic-id="0" semantic-parent="5">a</mi>
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<mo semantic-type="operator" semantic-role="addition" semantic-id="1" semantic-operator="infixop,+" semantic-parent="5">+</mo>
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<mi semantic-type="identifier" semantic-role="latinletter" semantic-id="2" semantic-parent="5">b</mi>
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<mo semantic-type="operator" semantic-role="addition" semantic-id="3" semantic-operator="infixop,+" semantic-parent="5">+</mo>
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<mi semantic-type="identifier" semantic-role="latinletter" semantic-id="4" semantic-parent="5">c</mi>
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</math>
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``` |
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\ No newline at end of file |
