Hi. Thanks for information.

Instead using rich-text resources (<b></b>), may you inform if there is other way of putting in "bold" direct in CSL code?

For instance, the code <text variable="title" font-weight="bold"/> puts the whole "title" in bold. Using the character ":", could the CSL code puts bold font in which is before ":" and puts normal font in which comes after ":"?

At the moment, neither Zotero or CSL distinguishes between main title and subtitle, so this currently can't be coded in a CSL style.

While this isn't supported, there are some solutions on the drawing board. An interesting suggestion in the archives comes from Dan, writing two and a half years ago:

I don't suppose there's any chance that the Short Title field will always be a left-bound substring of the Title field? If so, we'd have both the full, unaltered original title and a pretty good hint as to where to look for the delimiter, and it could be manually adjusted if the initial (currently unsophisticated) logic to generate the Short Title failed.

I'm playing with with a way to exploit this idea in MLZ (the experimental multilingual client, fueled by an extended, similarly experimental version of CSL). The design is still in flux, but here's a brief outline.

The processor now has external abbreviation-list functionality. This allows malable short-forms like "Journal Abbreviation" and "Short Title" to be acquired from an external, style-specific database, using the full-form field as key. That makes the "Journal Abbreviation" field unnecessary, and frees up "Short Title" for the specific, limited purpose of providing an exact match to the leading portion of the "title" field, as Dan suggested. In an extended version of CSL, a matched pair of fields could be used to derive a "main-title" and a "sub-title" variable (official CSL 1.0 already does something similar with the "page-first" field, which is derived from "page"). This would give us backward compatibility in CSL: a style could either use the "title" field as at present, or test for the presence of the "main-title" and "sub-title" elements and format them as required.

A long explanation, and not currently a part of CSL, but one idea for how we might deal with this use case down the road.

@cadudesun: My note above is about future avenues for development. There is currently no way to do what you want to do in CSL. You would have to put the <b>bold tags</b> directly into the content field, which isn't really desirable since few styles need boldface there. In the short term, your best solution is probably to add the boldface to your citations in a copy of the document at the last stage of production, after removing Zotero field codes.

Hi! Nowadays, is there any news about the possibility to to “bold” just part of the content of an title field (actually, just when there is subtitle, the part either before a colon [:] or dash [-])?

Illustrated as before:
Africa Today: Freedom and Peace / I would like to bold just “Africa Today” / “: Freedom and Peace” should be in “normal” font.

Thanks!

Returning 5 years later to ask:
Is there any update about the possibility to “bold” or "italicize" just part a title field when it is a subtitle (the part either before a colon [:] or dash [-])?

Example:
From=> Africa Today: Freedom and Peace
To=> Africa Today (bold/italicized font): Freedom and Peace (regular font)

Thanks!

Zotero is a little closer in that citeproc-js now automatically parses main and subtitles based on punctuation. Zotero uses this for one feature (uppercase subtitles in APA style). More elaborate use of the distinction probably would require more formal support in CSL for separate styling or main and subtitles.

If it doesn't cause problems, that might be a useful feature to enable for unofficial style editing.

Hello. I have also been waiting for this implementation for a long time. It is very important for ABNT to distinguish between "title" and "subtitle" for the correct application of formatting.
Thank you for your efforts...

Hi there! I am a Brazilian grad student and I face the same problem. But I came up with a simple, workable solution. I type the work's subtitle in the Extra field preceded by a "subtitle" variable. Then I entered a condition on the bibliography code for book, book section, and thesis to display the text of that variable, changing the punctuation after the "title" macro to colon, if the "subtitle" variable is present. The thing is, when installing the new style into Zotero, an error message is displayed: "... is not a valid CSL 1.0.2 style file, and may not work properly with Zotero", due to the variable, which is not a valid one in CSL file. However, proceeding with the installation, the style works properly and delivers the expected outcome. I am very pleased with it. Virtually any variable could have been used to provide the same outcome, but I chose one that resonates with the content it is intended to.