This is a metadata element intended to hold the series number in the rare case where a single journal has multiple volumes of the same number.
The rare example of this is a publisher reissuing a journal and restarting the volume number with “1”. Duplicate volume numbers would then exist and need to be differentiated in citations. A publisher may add a series number to the volume and <volume-series> has been created to hold such a number.
<volume-series> should hold the number or name of the series of the volume’s series (“1” for the original numbering and “2” for the re-numbering), while <volume> holds the number of the volume within that series (for example, “519”).
<!ELEMENT volume-series (#PCDATA %volume-series-elements;)* >
(#PCDATA | email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | alternatives | inline-graphic | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x)*
Any combination of:
No sample is available at this time.