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Re: [ddlm-group] Space as a list item separator>
- To: Group finalising DDLm and associated dictionaries <ddlm-group@iucr.org>
- Subject: Re: [ddlm-group] Space as a list item separator>
- From: "Herbert J. Bernstein" <yaya@bernstein-plus-sons.com>
- Date: Tue, 1 Dec 2009 06:01:48 -0500 (EST)
- In-Reply-To: <279aad2a0911302252m58914467k7931449848c6c6e6@mail.gmail.com>
- References: <C7398588.126B6%nick@csse.uwa.edu.au><275884.79342.qm@web87006.mail.ird.yahoo.com><84104.25546.qm@web87002.mail.ird.yahoo.com><alpine.BSF.2.00.0911300822020.56763@epsilon.pair.com><alpine.BSF.2.00.0911300835021.56763@epsilon.pair.com><279aad2a0911301433se2d145fi9ac2df69cd047583@mail.gmail.com><279aad2a0911302230v15316aadk9d27c252ce04bfc6@mail.gmail.com><279aad2a0911302252m58914467k7931449848c6c6e6@mail.gmail.com>
First amending the arguments To summarise the arguments: 1. In favour of both space and comma - comma is used in some other non-CIF contexts as a list delimiter - comma allows a large subset of lists and arrays to be carried opaquely in CIF 1 and CIF 1.1 documents. 2. Against comma: - A single type of separator makes the grammar simpler - Space is used everywhere else in CIF as a separator (consistency) - Comma can then be used in non-delimited strings Then I vote for comma and space -- Herbert ===================================================== Herbert J. Bernstein, Professor of Computer Science Dowling College, Kramer Science Center, KSC 121 Idle Hour Blvd, Oakdale, NY, 11769 +1-631-244-3035 yaya@dowling.edu ===================================================== On Tue, 1 Dec 2009, James Hester wrote: > Dear CIF2 people: the time has come to vote on the list item separator > issue. Firstly: as far as I know, nobody is against space as a separator, > so spaces will be possible list item separators. Some may be against > commas, so this vote is on whether or not to allow commas. > > To summarise the arguments: > > 1. In favour of both space and comma > - comma is used in some other non-CIF contexts as a list delimiter > > 2. Against comma: > - A single type of separator makes the grammar simpler > - Space is used everywhere else in CIF as a separator (consistency) > - Comma can then be used in non-delimited strings > > Space only: Nick, James (Nick is here) > Comma and Space: ? > > On Tue, Dec 1, 2009 at 5:30 PM, James Hester <jamesrhester@gmail.com> wrote: > More specifically, CIF1.1 excludes square brackets as the first > character in a non-delimited string. > > > On Tue, Dec 1, 2009 at 9:33 AM, James Hester <jamesrhester@gmail.com> > wrote: > Dear Herbert: as CIF 1.1 doesn't define lists, I'm not > sure why you suggest that the example below is a valid > tag. > > On Tue, Dec 1, 2009 at 12:36 AM, Herbert J. Bernstein > <yaya@bernstein-plus-sons.com> wrote: > Sorry something got lost in the prior message. > It should have > read: > > Dear Colleagues, > > Back to the question of commas. > If you accept the desirability of > having a CIF 1.5, commas in lists > become very useful. Someone with > a CIF 1.1 editor will be able to > prepare a CIF 1.5 file for many > useful cases by doing all lists > with commas and no embedded blanks > as long as they can make their > lists fit on single lines. In CIF > 1.1 > > [[1,2,3],[4,5,6],[7,8,9]] > > is a valid value for a tag, but > > [[1 2 3] [4 5 6] [7 8 9]] > > is not. > > > No, neither example is a valid CIF 1.1 tag. CIF 1.1 explicitly > excludes brackets as the first character of a non-delimited > string. > > > Having the option of commas in lists > will help to smooth the > transition for at least some people. > > > > -- > T +61 (02) 9717 9907 > F +61 (02) 9717 3145 > M +61 (04) 0249 4148 > > > > > -- > T +61 (02) 9717 9907 > F +61 (02) 9717 3145 > M +61 (04) 0249 4148 > > > > > -- > T +61 (02) 9717 9907 > F +61 (02) 9717 3145 > M +61 (04) 0249 4148 > >
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