On 1/29/2023 5:03 PM, Yaroslav Beltukov via ntg-context wrote:
Dear Hans and all contributors,
I really appreciate ConTeXt for the right way to obtain high quality
documents. I'm a theoretical physicist and I'm going to write a book. I
think ConTeXt is the right choice to work with a number of formulas,
figures and cross-references. The visual quality of formulas is better
than in regular LaTeX. The new feature with formula autosplitting looks
also very promising. For me it is important to obtain the high quality
without a lot of manual tweaks of each formula for each given document
format and figure placement.
However, I have found a problem with references if I compile one
component only. The references to formulas in other components have
wrong prefixes, e.g. (2.1) instead of (3.1). Needless to say, the right
formula references are very important.
I started looking into this issue. The references to other components
are taken from the whole product as from an external document. It turned
out that this is a general problem with references with prefixes to
external documents. The prefix is stored in a tuc file as a reference to
a section as a sequential number of the header in the document. As a
result, the prefix from the external document is calculated using the
structure of the current document.
Here is the MWE, which consists of two files:
foo.tex:
\defineenumeration[remark][prefix=yes, prefixsegments=chapter:section]
\starttext
Equations: \in[eq1], \in[eq2], \in[eq3], \in[eq4]
Sections: \in[sec1], \in[sec2], \in[sec3], \in[sec4]
Chapters: \in[chap1], \in[chap2], \in[chap3], \in[chap4]
Remarks: \in[remark1], \in[remark2]
\startbodymatter
\chapter[chap1]{Chapter}
\placeformula[eq1]\startformula x = y\stopformula
\chapter[chap2]{Chapter}
\section[sec1]{Section}
\section[sec2]{Section}
\placeformula[eq1]\startformula x = y\stopformula
\placeformula[eq2]\startformula x = y\stopformula
\stopbodymatter
\startappendices
\chapter[chap3]{Chapter}
\section[sec3]{Section}
\placeformula[eq3]\startformula x = y\stopformula
\section[sec4]{Section}
\startremark[remark1]\stopremark
\placeformula[eq4]\startformula x = y\stopformula
\startremark[remark2]\stopremark
\chapter[chap4]{Chapter}
\stopappendices
\stoptext
bar.tex:
\starttext
Equations: \in[foo::eq1], \in[foo::eq2], \in[foo::eq3], \in[foo::eq4]
Sections: \in[foo::sec1], \in[foo::sec2], \in[foo::sec3], \in[foo::sec4]
Chapters: \in[foo::chap1], \in[foo::chap2], \in[foo::chap3], \in[foo::chap4]
Remarks: \in[foo::remark1], \in[foo::remark2]
% any chapters and sections here
\stoptext
It is expected to have the same first page on these documents:
Equations: 1.1, 2.2, A.1, A.2
Sections: 2.1, 2.2, A.1, A.2
Chapters: 1, 2, A, B
Remarks: A.2.1, A.2.2
However, the bar.tex produces wrong prefixes to formulas and remarks.
The output depends on the document structure of bar.tex, not foo.tex.
I started looking into the source code. Thanks to lua, it is not a big
deal to track the problem. The prefixdata is complemented by the
sectiondata after the loading the tuc file. So, the question is: is it
possible to store the full prefixdata with all necessary prefix numbers
in the tuc file? Here is my proposal to change the source code:
--- strc-lst-old.lmt 2023-01-29 11:30:15.610309948 +0300
+++ strc-lst.lmt 2023-01-29 12:10:08.864228923 +0300
@@ -266,6 +266,16 @@
if r and not r.section then
r.section = structures.sections.currentid()
end
+ -- store sectiondata in prefixdata (necessary for external files)
+ if t.prefixdata and r.section then
+ local sectiondata = structures.sections.collected[r.section]
+ if sectiondata then
+ for k, v in next, sectiondata do
+ t.prefixdata[k] = v
+ end
+ end
+ end
+ --
local b = r and t.block
if r and not b then
local s = r.section
--- strc-ref-old.lmt 2023-01-29 11:30:15.823643904 +0300
+++ strc-ref.lmt 2023-01-29 12:07:45.697109862 +0300
@@ -2318,7 +2318,17 @@
if data then
numberdata = lists.reordered(data) -- data.numberdata
if numberdata then
- helpers.prefix(data,prefixspec)
+ -- helpers.prefix(data,prefixspec)
+ -- use the actual numbers from prefixdata
+ local prefixdata = data.prefixdata
+ if prefixdata then
+ -- adapted from helpers.prefix (not sure)
+ if (prefixspec and prefixspec == no) or
prefixdata.prefix == no then
+ prefixdata = false
+ end
+ sections.typesetnumber(prefixdata,"prefix", prefixspec
or false, prefixdata)
+ end
+ --
sections.typesetnumber(numberdata,"number",numberspec,numberdata)
else
local useddata = data.useddata
After this small change, all the references are correct. However, I'm
quite new to ConTeXt, so maybe here are some caveats. It would be great
to fix the references to formulas, especially for the forthcoming
document about maths.
that will bloat the already large tuc file, so here is an alternative (i
bet you can find where to patch):
strc-ref
local external = struc.references.collected -- direct references
local lists = struc.lists.collected -- indirect
references (derived)
local pages = struc.pages.collected -- pagenumber data
local sections = struc.sections.collected
and
if prefix == "" then
prefix = name -- this can clash!
end
local section = references.section
if section then
if sections then
references.sectiondata = sections[section]
else
-- warning
end
end
strc-pag:
local sectiondata = references.sectiondata or
sections.collected[references.section]
if not sectiondata then
return entry, false, "no section data"
end
there might be a few more such places where we can bind to the loaded data
Hans
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