From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ulf Stegemann Subject: Re: org-entities-user Date: Thu, 20 May 2010 08:40:18 +0200 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from [140.186.70.92] (port=60324 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OF3gu-0000xA-Gx for emacs-orgmode@gnu.org; Thu, 20 May 2010 07:13:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OF3go-0003Wo-A2 for emacs-orgmode@gnu.org; Thu, 20 May 2010 07:13:28 -0400 Received: from lo.gmane.org ([80.91.229.12]:56623) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OEzQo-0004NL-Lv for emacs-orgmode@gnu.org; Thu, 20 May 2010 02:40:34 -0400 Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1OEzQh-00030F-L8 for emacs-orgmode@gnu.org; Thu, 20 May 2010 08:40:27 +0200 Received: from london.zeitform.net ([146.140.213.100]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 20 May 2010 08:40:27 +0200 Received: from ulf-news by london.zeitform.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 20 May 2010 08:40:27 +0200 List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org To: emacs-orgmode@gnu.org Dear Nathaniel, Nathaniel Flath wrote: > I've been setting up org-entities-user with a few custom symbols, and > managed to get a few aliases for items already in org-entities, but i'm a > bit stuck on adding new items - specifically, the mathbb versions of Z and R > (the symbols for the sets of integers and reals). I can't seem to find the > UTF-8, latin-1, or HTML encodings of these entities - and I'm not sure how > to input the utf-8 or latin-1 even if I do. Does anyone know how to do > this? there's nothing like a blackboard or double-struck R and Z in latin-1 (and ASCII) so you will need to live with a transcription like `R' or `REALS' &c. In unicode these characters are called `double-struck capital r' and `double-struck capital z' and they have the hex values 211d and 2124 respectively. In Emacs you can enter them with `C-x 8 RET 211d RET' or `C-x 8 RET double-struck capital r RET'. The corresponding XML (XHTML) entities are `ℝ' or `ℝ' and `ℤ' or `ℤ' respectively. However, at least latest firefox does not know how to render these and outputs these entities literally so you might prefer to go for a transcription as well or use a unicode page encoding with the appropriate unicode characters. In case you are interested in further blackboard characters, w3c has a nice page about double-struck entities. Find it at http://www.w3.org/TR/xml-entity-names/double-struck.html. HTH, Ulf