One physical or logical line of an address.
An address (<address>) is a postal address and/or other contact information. An address line (<addr-line>) is one physical or logical line of an address, typically containing undifferentiated portions of an <address> such as street addresses, post box numbers, building numbers, mailstops, etc. They are called “lines” because addresses are frequently divided onto multiple lines, and this encoding allows that fact to be preserved.
There are many ways to tag an address: as text; as a series of named address elements including <country>, <email>, <fax>; as a series of address lines <addr-line> which may or may not have other elements such as <country> identified within them as a mixture of named elements and address lines; etc.
Common Practice: If the address is divided into lines, the lines can be preserved using the <addr-line> element. If the address is just a block of undifferentiated text, numbers, or special characters, the entire address may be placed inside one <addr-line> element.
<!ELEMENT addr-line (#PCDATA %addr-line-elements;)* >
(#PCDATA | email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | fixed-case | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | ruby | alternatives | inline-graphic | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | index-term | index-term-range-end | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x | country | fax | institution | institution-wrap | phone)*
Any combination of:
An address line shown inside an affiliation and inside an address:
...
<contrib contrib-type="author" rid="IIDR">
<name><surname>Taylor</surname>
<given-names>James C.</given-names></name>
<degrees>PhD</degrees>
<aff id="IIDR">
<institution>Institute of Infectious Disease Research
</institution>
<break/>
<addr-line>Oberlin, MD 20869</addr-line>
</aff>
<address>
<institution>Kalakukko Corporation</institution>
<addr-line>17 West Jefferson St.</addr-line>
<addr-line>Suite 207</addr-line>
<addr-line>New South Finland, MD 20856</addr-line>
<country>USA</country>
<phone>(301) 754-5766</phone>
<fax>(301) 754-5765</fax>
<email>jct@kalakukko.com</email>
<uri>http://www.kalakukko.com</uri>
</address>
</contrib>
...