A page number (potentially one of many) present on a physical page
The page-num-type attribute is a hook for book- specific processing, for example, to allow one page number to be marked as primary; to distinguish between printed numbers provided by the publisher and penciled numbers added by a library; or to make other pagination distinctions.
<!ELEMENT page-num (#PCDATA) >
Text, numbers, or special characters
... <p>In pursuance of this laudable object, proposals were, in the year 1811, made to the Yearly Meeting of Philadelphia, from two of the Quarterly Meetings, to make provision for such of their members as were deprived of their reason. The consideration of the subject was referred to a committee, who sub-<alt-term alt-term-type="hyphenation" display="no">submitted</alt-term> <page-start><page-num>4</page-num></page-start> <alt-term alt-term-type="hyphenation" display="no">submitted</alt-term>mitted their report in the following year, which was adopted by the meeting; and, in consequence of this conclusion, a plan and proposals for an asylum were circulated among Friends. This plan was not restricted to the admission of members only, but included all those who professed the principles of the society, under whose care and notice it was to be wholly conducted.</p> ...