Hi Carsten,
>> --8<---------------cut here---------------start------------->8---
>> * First
>> :PROPERTIES:
>> :CUSTOM_ID: heading-a
>> :END:
>>
>> Hello Toto!
>>
>> * Second
>> # <<heading-b>>
>>
>> Hello Tata!
>>
>> * Third
>> #+CUSTOM_ID: heading-c
>>
>> Hello Titi!
>>
>> * Fourth
>> #+ID: heading-d
>>
>> Hello Tete!
>>
>> [[heading-a]]
>> [[heading-b]]
>> [[heading-c]]
>> [[heading-d]]
>> --8<---------------cut here---------------end--------------->8---
>>
>> Which give the following LaTeX code:
>>
>> --8<---------------cut here---------------start------------->8---
>> \section{First}
>> \label{sec-1}
>> \label{heading-a}
>>
>>
>> Hello Toto!
>>
>> \section{Second}
>> \label{sec-2}
>> \label{heading-b}
>>
>>
>> Hello Tata!
>>
>> \section{Third}
>> \label{sec-3}
>>
>>
>> Hello Titi!
>>
>> \section{Fourth}
>> \label{sec-4}
>>
>>
>> Hello Tete!
>>
>> \hyperref[sec-1]{heading-a}
>> \hyperref[sec-2]{heading-b}
>> \hyperref[sec-3]{heading-c}
>> \hyperref[sec-4]{heading-d}
>> --8<---------------cut here---------------end--------------->8---
>>
>> The third and fourth cases are very elegant as they use only aliases (which
>> are dropped from the LaTeX code).
>
> Third and forth are non-existent syntax in Org, these lines are just treated
> as comments and are removed during export.
OK. But the information in these 2 comments is correctly used to replace the
alias (heading-c and heading-d) with the label generated by org during the
export. See the last 2 references in my example: these references are correct.
They thus have been correctly processed from heading-c and heading-d to sec-3
and sec-4... these comments are thus not simply removed... right?
In the case of the :CUSTOM_ID: property, the property is also used to convert
the alias to the label (heading-a to sec-1) but additionally an extra label
(heading-a) is created and not used.
That's why, when creating references to sections I found the #+CUSTOM_ID very
elegant... But apparently I don't have to use such syntax...
I wanted to know the recommended way of doing references...
Thanks a lot for your help.
Francesco
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