Re: CSS selectors are syntactic sugar for XPath expressions

From: Tony Graham <tgraham@antenna.co.jp>
To: xml-dev@lists.xml.org
Date: Tue, 22 Mar 2022 08:57:26 +0000

Play the video

On 22/03/2022 01:13, Liam R. E. Quin wrote:
...

Which came first depends on whether you see XPath as a natural
evolution of HyTime and TEI Pointers combined with the needs of DSSSL,
or as something new, but then, CSS was influenced by Grif.

Maybe not so much: Hakon Wium Lie's Ph.D thesis on Cascading Style
Sheets [1], unsurprisingly, cites [2] his own 'Cascading HTML Style
Sheets' (CHSS) [3] and Bert Bos's 'Stream-based style sheet proposal'
(SSP) as the basis for CSS development.

CHSS selectors look like the left-side of X11 Resource declarations.
SSP selectors also look a lot like X11 Resource names that use '*' to
skip levels of the element hierarchy.

The thesis discusses the P language [5] that is one of the 'Thot'
languages implemented in the Thot library that is/was part of both Grif
and the Amaya web browser, among others. As described in the thesis,
the P language in Amaya had to be extended to better handle CSS.

The more complex P selector provided in the thesis manages to not look
like CSS:

LI: BEGIN
if within OL Size: 10 pt;
END;

Regards,

Tony Graham.
--
Senior Architect
XML Division
Antenna House, Inc.
----
Skerries, Ireland
tgraham@antenna.co.jp

[1] http://web.archive.org/web/20220214071421/https://www.wiumlie.no/2006/phd/
[2] http://web.archive.org/web/20220214071421/https://www.wiumlie.no/2006/phd/#h-274
[3] http://web.archive.org/web/20220214071421/https://www.wiumlie.no/2006/phd/#h-164
[4] http://web.archive.org/web/20220214071421/https://www.wiumlie.no/2006/phd/#h-231
[5] http://web.archive.org/web/20220214071421/https://www.wiumlie.no/2006/phd/#h-107

Follow-Ups:
- Re: CSS selectors are syntactic sugar for XPath expressions
  - From: Pete Cordell <pete++xmldev@codalogic.com>

References:
- CSS selectors are syntactic sugar for XPath expressions
  - From: Roger L Costello <costello@mitre.org>
- Re: CSS selectors are syntactic sugar for XPath expressions
  - From: "Simon St.Laurent" <simonstl@simonstl.com>
- Re: CSS selectors are syntactic sugar for XPathexpressions
  - From: "Liam R. E. Quin" <liam@fromoldbooks.org>

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