The size (such as running time, page count, or physical dimensions) of an object, such as a product (software package, video, audio book, hardware component, etc.) that is being reviewed
The @units attribute must be used to name the unit of measure (minutes, hours, linear feet, pages, etc.).
(#PCDATA)*
Text, numbers, or special characters, zero or more
...
<article-meta>...
<product>
<source>Polarities of Experience: Relatedness and Self-Definition in Personality Development, Psychopathology,
and the Therapeutic Process</source>.
By <person-group><string-name><given-names>Sidney J.</given-names> <surname>Blatt</surname></string-name></person-group>
<publisher-loc>Washington, DC</publisher-loc>: <publisher-name>American Psychological Association</publisher-name>, <year>2008</year>,
<size units="pages">404 pp</size>. <isbn content-type="ISBN-13">978-1-4-4388-0314-7</isbn>. <comment>$69.95. (hardcover)</comment></product>...
common3.ent