Changes for page Homoiconicity

Last modified by Nicolas Gregoire on 2012/01/05 00:18
From version Icon 8.1 Icon
edited by Nicolas Gregoire
on 2012/01/05 00:25
Change comment: There is no comment for this version
To version Icon 9.1 Icon
edited by Nicolas Gregoire
on 2012/01/05 00:26
Change comment: There is no comment for this version

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1 -== Definition ==
1 +== General definition ==
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3 3  Homoiconicity is the property of a programming language that the code and the data are stored in the same format. For example, the following languages are homoiconics :
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6 6  * Lisp : using lists and theirs sub-types
7 7  * XSLT : using the XML format
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11 11  == Triggering embedded code ==
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13 13  In some contexts (like browsers), XSLT code execution can be triggered while a XML document is parsed, via a xsl:stylesheet tag. The executed XSLT code can be stored on the Internet or in the XML document itself (homoiconicity + self-reference trick). A [[blog post>>http://scarybeastsecurity.blogspot.com/2011/01/harmless-svg-xslt-curiousity.html||rel="__blank"]] by Chris Evans describes a pseudo SVG file triggering a simple RAM DoS . But we can do better ;-)