There's plenty of history of s-expression formats for documentation. One example is: https://github.com/Clozure/ccl/tree/master/doc/manual https://github.com/C

There's plenty of history of s-expression formats for documentation. One example is: https://github.com/Clozure/ccl/tree/master/doc/manual https://github.com/Clozure/ccl/tree/master/doc/manual But, also, there's plenty of uses of XML that are not "artcles and books". For example, Maven's pom.xml and log4j2.xml.