Searching or matching text

In https://github.com/w3c/mathml-core/issues/219 , the reply states:

If the spec (or its implementation) allows searching or matching of text, including syntax and identifiers understand the implications of normalisation, case folding, etc. Also check the detailed guidance for Text-processing.

The spec does not address the searching or matching of text.

But maybe it one day should? Would knowing answers to questions such as:

• Should the ascii query "-x2" match against

    <mrow>
      <mo>&minus;</mo>
      <msup><mi>x</mi><mn>2</mn></msup>
    </mrow>
  

• Should the ascii query "1.2" match against a <mn>1,2</mn> in a page with lang attribute indicating a country using a decimal comma? And vice versa for the query 1,2 against <mn>1.2</mn> in a page with lang attribute suggestive of a decimal point? Or neither, or both?
• Should searching for a fenced expression, as with the ascii query (x,y) match against equivalent notations say with lang="fr", such as ]x,y[ ? Probably a good place to say "no" and draw the line of what is within reasonable expectations...

Would adding some text discussing these aspects be generally helpful for better math i18n in the ctrl+f "page search" of browsers?

Read issue #219 and the linked W3C Text-processing guidance first; the issue provides no repository file or test entry point. Determine whether MathML Core should define search and matching behavior for the listed normalization and locale examples, then record the agreed scope or specification text.