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<overline-start> Overline Start
Milestone indicating the beginning of overline emphasis.
Usage/Remarks
The <overline-start> and <overline-end> elements act as milestone tags marking the start and end of overlining that may extend
across element boundaries, mostly within mathematics, when ordinary MathML underline
and overline functions are inadequate.
The <overline-start> and <overline-end> elements enable creation of overlines in content, most commonly in mathematical content,
where a normal overline element (<overline>) would break the XML well-formedness rule that no two elements may overlap. The overline
created using these two elements can have arbitrary start and end points because the
start and end elements are paired through the use of the unique identifiers (IDs), not as the start and end of a single element. For example, in the text “ABCD”,
if the text “ABC” is to be overlined and the text “CD” is to be underlined, ordinary
overlining with the <overline> element would create invalid tag overlap. The text could be correctly tagged, using
the <overline-start> and <overline-end> elements, as:
... <overline-start id="ov1"/>AB <underline-start id="ul1"/>C <overline-end rid="ov1"/>D <underline-end rid="ul1"/> ...
Attributes
Multi-lang Attributes
Models and Context
May be contained in
<abbrev>, <abbrev-journal-title>, <addr-line>, <aff>, <alt-title>, <anonymous>, <article-title>, <attrib>, <award-id>, <bold>, <chapter-title>, <chem-struct>, <code>, <collab>, <collab-name>, <comment>, <compound-kwd-part>, <compound-subject-part>, <conf-acronym>, <conf-date>, <conf-loc>, <conf-name>, <conf-num>, <conf-sponsor>, <conf-theme>, <copyright-statement>, <corresp>, <data-title>, <date-in-citation>, <def-head>, <degrees>, <disp-formula>, <edition>, <element-citation>, <email>, <etal>, <ext-link>, <fax>, <fixed-case>, <funding-source>, <funding-statement>, <given-names>, <gov>, <history>, <inline-formula>, <inline-media>, <inline-supplementary-material>, <institution>, <issue>, <issue-part>, <issue-sponsor>, <issue-subtitle>, <issue-title>, <italic>, <journal-subtitle>, <journal-title>, <kwd>, <label>, <license-p>, <meta-name>, <meta-value>, <mixed-citation>, <monospace>, <named-content>, <on-behalf-of>, <overline>, <p>, <part-title>, <patent>, <phone>, <prefix>, <preformat>, <price>, <product>, <publisher-loc>, <publisher-name>, <rb>, <related-article>, <related-object>, <resource-name>, <role>, <roman>, <sans-serif>, <sc>, <see>, <see-also>, <self-uri>, <series>, <series-text>, <series-title>, <sig>, <sig-block>, <size>, <source>, <speaker>, <std>, <std-organization>, <strike>, <string-conf>, <string-date>, <string-name>, <styled-content>, <sub>, <subject>, <subtitle>, <suffix>, <sup>, <supplement>, <support-source>, <surname>, <target>, <td>, <term>, <term-head>, <textual-form>, <th>, <title>, <trans-source>, <trans-subtitle>, <trans-title>, <underline>, <unstructured-kwd-group>, <uri>, <verse-line>, <version>, <volume>, <volume-id>, <volume-series>, <x>, <xref>
Description
This is an EMPTY element
Content Model
<!ELEMENT overline-start EMPTY >