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nLab > nLab Technical Matters: Page belonging to two categories?

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  1.  
    • CommentRowNumber1.
    • CommentAuthorAli Caglayan
    • CommentTimeSep 5th 2018
    • (edited Sep 5th 2018)

    Can pages belong two two categories? On the HoTT wiki we have the page type family (homotopytypetheory) which belongs to the “type theory” category but could just as well belong to the “homotopy theory” category. Obviously putting them both in doesn’t work. It’s a bit difficult searching for information about nlab categories due to nlab being about categories.

    • CommentRowNumber2.
    • CommentAuthorUrs
    • CommentTimeSep 5th 2018
    • (edited Sep 5th 2018)

    belongs to the “type theory” category but could just as well belong to the “homotopy theory” category.

    Wouldn’t that necessarily be the case for pretty much every single page in a homotopy type theory wiki?

    Just to record that I never used the “category”-functionality on the nLab (except for category:people). The reason is that, to date, it does not produce useful functionality.

    The useful way to show the reader a survey of entries that belong to a given topic cluster is to create such a list by hand (see e.g. model category theory - contents) and then include it as a floating TOC into the relevant entries, by (in this example) including these lines:

      +-- {: .rightHandSide}
  +-- {: .toc .clickDown tabindex="0"}
  ###Context###
  #### Model category theory
  +--{: .hide}
  [[!include model category theory - contents]]
  =--
  =--
  =--
    • CommentRowNumber3.
    • CommentAuthorAli Caglayan
    • CommentTimeSep 5th 2018
    The "homotopy theory" category is really "synthetic homotopy theory". I think categories may be useful when viewing via all pages. I will try to use this side bar technology. I wasn't really sure how it was used before. Thank you for the suggestions.
    • CommentRowNumber4.
    • CommentAuthorRichard Williamson
    • CommentTimeSep 6th 2018
    • (edited Sep 6th 2018)

    [Edited: replied to wrong thread initially.]

    I think it should be possible to add to more than one category (independently of the question of usefulness)…I’ll look into it if that’s not the case. Just have to prioritise a bit.

  5. Hi Ali, I finally took a look at this just now. The syntax for including in more than one category is to use a comma-separated list. I have fixed it now on the page you linked to.

    • CommentRowNumber6.
    • CommentAuthorAli Caglayan
    • CommentTimeSep 20th 2018

    Thank you very much Richard!

1 to 6 of 6

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