Metacrap is a portmanteau drawn from metadata and crap. The origin of the word is unknown, but it was popularized by Cory Doctorow in a 2001 essay titled "Metacrap: Putting the torch to seven straw-men of the meta-utopia." 
In the essay, Doctorow illustrates problems in relying on metadata for knowledge representation in online records or files by drawing humorous parallels to real-world systems, as well as showing examples of metadata collapse in online, web-based systems. The fragility of metadata is an important concern because much planning for improving the web (such as the semantic web) is predicated upon certain flavors of metadata becoming widely adopted and used with care -- something which, according to Doctorow's essay, will not and cannot happen.
Doctorow's seven insurmountable obstacles to reliable metadata are:
- People lie
- People are lazy
- People are stupid
- Mission Impossible: know thyself
- Schemas aren't neutral
- Metrics influence results
- There's more than one way to describe something
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Last updated on Friday March 14, 2008 at 16:25:43 PDT (GMT -0700)
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