Re: missing element in org-element.el

[Thorsten Jolitz <tjolitz@gmail.com>]

Nicolas Goaziou <n.goaziou@gmail.com> writes:

> Thorsten Jolitz <tjolitz@gmail.com> writes:
>
>> comparing this
>>
>> ,----------------------------------------------------------------------------
>> | (defconst org-element-all-elements
>> |   '(babel-call center-block clock comment comment-block diary-sexp drawer
>> |                dynamic-block example-block export-block fixed-width
>> |                footnote-definition headline horizontal-rule inlinetask item
>> |                keyword latex-environment node-property paragraph plain-list
>> |                planning property-drawer quote-block quote-section section
>> |                special-block src-block table table-row verse-block)
>> |   "Complete list of element types.")
>> `----------------------------------------------------------------------------
>>
>>
>> to this
>>
>> ,------------------------------------------------------------------
>> | (defconst org-element-secondary-value-alist
>> |   '((headline . :title)
>> |     (inlinetask . :title)
>> |     (item . :tag)
>> |     (footnote-reference . :inline-definition))
>> |   "Alist between element types and location of secondary value.")
>> `------------------------------------------------------------------
>>
>> reveals that 'footnote-reference' is missing in the first list.
>
> A `footnote-reference' is an object type (see
> `org-element-all-objects'), not an element: as such it doesn't belong to
> `org-element-all-elements'.
>
> `org-element-secondary-value-alist' is a list of elements and objects
> containing a secondary string.

Ok, I see, thanks. 

What about 

,----------------
| latex-or-entity
| plain-link
| text-markup
`----------------

in 

,---------------------------------------------------------------------------------
| (defconst org-element-all-successors
|   '(export-snippet footnote-reference inline-babel-call inline-src-block
|                    latex-or-entity line-break link macro plain-link radio-target
|                    statistics-cookie sub/superscript table-cell target
|                    text-markup timestamp)
|   "Complete list of successors.")
`---------------------------------------------------------------------------------

? 

They seem to be neither elements nor objects - are they a kind of
'abstract categories' for some object types?

And I must admit that I'm not sure about the exact meaning of
'successors'. You describe elements and objects in detail in the
comment-section of org-element.el, but don't mention 'successors'. 

,---------------------------------------------------------------------
| (defconst org-element-object-successor-alist
|   '((subscript . sub/superscript) (superscript . sub/superscript)
|     (bold . text-markup) (code . text-markup) (italic . text-markup)
|     (strike-through . text-markup) (underline . text-markup)
|     (verbatim . text-markup) (entity . latex-or-entity)
|     (latex-fragment . latex-or-entity))
|   "Alist of translations between object type and successor name.
| Sharing the same successor comes handy when, for example, the
| regexp matching one object can also match the other object.")
`---------------------------------------------------------------------
 
The relation between object/successor is like concrete
subclass(es)/abstract superclass?

PS
I hope I don't go on your nerves with my questions, but I'm trying to
understand how you modeled an Org-file and its not all clear to me. 

-- 
cheers,
Thorsten