# [NTG-context] Cross references to column numbers

Oliver von Criegern oliver.v.criegern at badw-muenchen.de
Tue Sep 10 18:52:13 CEST 2019

Am 10.09.19 um 13:16 schrieb Hans Hagen:
> On 9/9/2019 10:05 PM, Henri Menke wrote:
>> Bump
>>
>> On 9/3/19 4:46 AM, Oliver von Criegern wrote:
>>> Dear list members,
>>>
>>> is there any way to get a cross reference to a column in a two
>>> column layout?
>
> yes and no:
>
> no : there is not something buil tin
> yes: one can write some hack in a few lines
>
> but instead of posting such a hack (which then will a live of its own)
>
> \pagereference[column:#1]
>
> \doifelsereferencefound{column:#1}{\number\referencecolumnnumber}{}
>
> in the next beta,
>
> Hans

This would be great, thanks!

Best regards,
Oliver

>
>>> At least, I would need to get some value that tells me whether the
>>> target is in the left or in the right column. How to achieve this?
>>>
>>> This is the more simplified version of the my previous question
>>> cited below.
>>>
>>> Best regards,
>>> Oliver.
>>>
>>>
>>> Am 12.08.19 um 15:26 schrieb Oliver von Criegern:
>>>> Dear list members,
>>>>
>>>> how can I create cross references to column numbers?
>>>>
>>>> I have a two column layout with column numbers in the header
>>>> instead of page numbers (actually, these column numbers are
>>>> calculated from the page numbers). Now I want to create a cross
>>>> reference that returns the column number of the target. How can I
>>>> achieve this?
>>>>
>>>> Of course, I can get the page number with \pagereference (for the
>>>> target) and \at (for the reference), but for calculating the column
>>>> number (according to what I did in the header), I would also need
>>>> to know whether the target is in the left or in the right column,
>>>> and I can't see how I can get this information.
>>>>
>>>> For an example, see the question posted by me at stackexchange:
>>>> https://tex.stackexchange.com/questions/502944/context-cross-references-to-column-numbers
>>>>
>>>>
>>>> Besides, I am wondering, regarding the generally very regular and
>>>> consistent naming of commands in ConTeXt, why this is not so in the
>>>> case of references. For example, to refer to a page, I need
>>>> \pagereference (for the target) and \at (for the reference); to
>>>> refer to a line, I need \someline (for the target) and \inline (for
>>>> the reference), but only if I want it to automatically add the word
>>>> "line" or something else before the number, otherwise I have to use
>>>> \inlinerange. It took me some time to find that out. Wouldn't it be
>>>> easier to have just one command for the target and another one for
>>>> the reference, and everything else, as counters and headers to be
>>>> returned, text to be added etc. to be configured by options?
> Because all these \in \at \about ... give back different things (a
> title, a number, a range, a ...) and packaging all that in one macro
> doens't make it cleaner so soon users will then wrap complex calls in
> a macro of their own (which then can clash with some existing name).
>
> Also, the ref mechanism evolved over decades and we're not going to
> drop compatibility.
>
> Hans
>
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Dr. Oliver von Criegern
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