From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/71977 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: xml and lua again Date: Fri, 28 Oct 2011 10:56:58 +0200 Message-ID: <4EAA6E5A.8010606@wxs.nl> References: <4EA2F34E.6080202@uni-bonn.de> <4EA53B44.1040105@wxs.nl> <4EA55792.9090408@uni-bonn.de> <4EA5598A.4060109@wxs.nl> <4EA599BE.2050304@uni-bonn.de> <4EA5B2F2.2050700@wxs.nl> <4EA684D9.2040702@uni-bonn.de> <4EA68CB4.30809@wxs.nl> <4EA68F04.4090706@uni-bonn.de> <4EA9231F.6080001@uni-bonn.de> <4EA93348.6030308@uni-bonn.de> <4EA93AE0.2000805@wxs.nl> <4EAA4A61.4090707@uni-bonn.de> <83BD5F74-4BB7-41D2-9C1E-F5F31084E6AC@gundla.ch> <4EAA51D6.3050909@uni-bonn.de> Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1319792262 7239 80.91.229.12 (28 Oct 2011 08:57:42 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 28 Oct 2011 08:57:42 +0000 (UTC) Cc: "Thomas A. Schmitz" To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Fri Oct 28 10:57:35 2011 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([195.12.62.10]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RJiFq-0007sl-4T for gctc-ntg-context-518@m.gmane.org; Fri, 28 Oct 2011 10:57:34 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 15E4DCB0AB; Fri, 28 Oct 2011 10:57:33 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id D+JENOBLjfhJ; Fri, 28 Oct 2011 10:57:30 +0200 (CEST) Original-Received: from balder.ntg.nl (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 45666CB0A5; Fri, 28 Oct 2011 10:57:30 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 75837CB0A5 for ; Fri, 28 Oct 2011 10:57:28 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id LxfmfDjtUDyQ for ; Fri, 28 Oct 2011 10:57:16 +0200 (CEST) Original-Received: from filter2-til.mf.surf.net (filter2-til.mf.surf.net [194.171.167.218]) by balder.ntg.nl (Postfix) with ESMTP id BBAE1CB0A4 for ; Fri, 28 Oct 2011 10:57:16 +0200 (CEST) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter2-til.mf.surf.net (8.14.3/8.14.3/Debian-5+lenny1) with ESMTP id p9S8v9dg025362 for ; Fri, 28 Oct 2011 10:57:16 +0200 X-Default-Received-SPF: pass (skip=loggedin (res=PASS)) x-ip-name=10.100.1.100; Original-Received: from [10.100.1.100] (unverified [10.100.1.100]) by pragma-net.nl (SurgeMail 5.3h2) with ESMTP (TLS) id 2092-1713362 for multiple; Fri, 28 Oct 2011 10:57:06 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 In-Reply-To: <4EAA51D6.3050909@uni-bonn.de> X-Authenticated-User: hagen@controller-9 X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN) X-CanIt-Geo: ip=213.125.29.162; country=NL; region=11; city=Den Haag; latitude=52.0833; longitude=4.3000; http://maps.google.com/maps?q=52.0833,4.3000&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 0bFO8V9kU - 9aa4be11a8fc - 20111028 X-Scanned-By: CanIt (www . roaringpenguin . com) on 194.171.167.218 X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.12 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl Xref: news.gmane.org gmane.comp.tex.context:71977 Archived-At: Hi Thomas, > thanks for your explanations! The point of my question was: can I feed > the content of tex.dimen["textwidth"] directly back to TeX, and the > answer to this appears to be "no"; you need to add some unit to it > (otherwise, you get an error message). Which was a bit confusing to me > at first, because the name tex.dimen implies that it holds a "real" > dimension, like \newdim does. Just switch to philosopher mode for a while and ask yourself what implications that would have in the rather fuzzy world of printing. What is a 'real' dimension? What we call points (pt) is in other application also called points but happens to be basepoints in our universe (bp). Also, imagine that in good american tradition the dimension would have been inches while we all moved on to meters ... So, Knuth foresaw this (and also wanted predictable calculations and wanted to avoid unportable floating points) so he came up with his own unit: scaled points. So, a \dimen is just a \count but consider it tagged to show you pt for convenience when printed (\the) and the parser permits you to enter these numbers as pt/bp/dd/cc/cm/mm etc. At the lua end all are just integers (with some limited size but that might change as Taco and I want to play a bit with adding a couple of bytes and see to what extent that will break things). In metapost the internal unit is bp (because it targets at postscript) and there cm, mm etc are just variables that one multiplies with so there you can change the universe by just saying "in := cm". Skips are another story (not to speak of boxes as we do have a dimendef but not a boxdef of inserts which are yet another class of animals). Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________