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    • CommentRowNumber1.
    • CommentAuthorTobyBartels
    • CommentTimeMar 24th 2010

    If you have a page, say marked simplicial set, that you want to get rid of because you have moved all of the material to another page, say model structure for Cartesian fibrations, then it will not work to simply add [[!redirects marked simplicial set]] to model structure for Cartesian fibrations and then move marked simplicial set to marked simplicial set > history using the all of the automatic features of the page move command. The reason is that, by default, the command [[!redirects marked simplicial set]] will be added to marked simplicial set > history as part of the course of the move. And so all of the links to marked simplicial set will redirect to marked simplicial set > history, rather than to model structure for Cartesian fibrations as you wanted. And what's worse, all of the old material will remain on marked simplicial set > history, so readers who get there by mistake may not even realise that something is wrong, unless they look carefully at the page name.

    The correct thing to do is this: First, start the move from marked simplicial set to marked simplicial set > history, but before you Submit (although after you enter the New name), click in the edit window. This will make [[!redirects marked simplicial set]] appear at the top. Delete everything except that line, and change that line to < marked simplicial set (notice that you only have to edit the beginning of the line), or something like that. Then Submit.

    Now the only redirect for marked simplicial set that exists is the one that you want, to model structure for Cartesian fibrations. And if anybody does land on marked simplicial set > history by accident, all that they will see is ‘< marked simplicial set’, which will automatically take them to whatever the correct redirect target for that may be (currently model structure for Cartesian fibrations, maybe something else if you change it later).

    • CommentRowNumber2.
    • CommentAuthorUrs
    • CommentTimeMar 24th 2010

    Thanks, Toby, for the detailed explanation. I wasn't aware of that.

    I think I fixed it now, following your instructions.

    So what is that lower-than-command?

    • CommentRowNumber3.
    • CommentAuthorTobyBartels
    • CommentTimeMar 24th 2010

    The &lt; just makes a little arrow '<'. It is purely cosmetic, to balance the '>' in the archive page name. (You have to write &lt; instead of < to avoid confusing the parser.) Then the link is there in case somebody gets lost.

    I've written some general instructions at HowTo#merging.