What do the terms "randart", "fixedart" and "egoitem" signify?

What do the terms "randart", "unrandart" and "egoitem" signify?

you might also stumble upon artefacts which come in three varieties:

you might also stumble upon artefacts which come in two varieties:

  predefined. There's no further difference except that players "in the know"
  can recognize such an item by its special description and/or colour.
* fixedart: an artefact that does not use the random artefact properties but
  instead has unique hardcoded effects and descriptions.

  predefined. While a few (formerly known as "fixed artefacts") have
  special hardcoded effects, for most there's no further difference except
  that players "in the know" can recognize such an item by its special
  description and/or colour/tile.

None of the three types can be enchanted or branded, neither temporarily nor

Neither of the types can be enchanted or branded, neither temporarily nor

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