On Mon, Mar 28, 2005 at 07:24:24PM +0400, Oleg Bartunov wrote:
> On Mon, 28 Mar 2005, Alvaro Herrera wrote:
>
> >On Mon, Mar 28, 2005 at 10:09:19AM +0400, Oleg Bartunov wrote:
> >>On Sun, 27 Mar 2005, Jim C. Nasby wrote:
> >>
> >>>Maybe it's just me, but it's pretty hard to read, especially at the top.
> >>
> >>what do you mean ? Too crowdy or text is too small ?
> >
> >I found it a little confusing. Do the lines go one way or the other?
> >Maybe sticking arrowheads could explain that. Also, is there a
>
> Hey, I learn inkscape only 1 day, I don't know how to create arrows.

Hmm. I think you could create a triangle using the "star" tool, and
stick a straight line to it. Then make a group of both (Ctrl-G IIRC).
Then you can make duplicates (Ctrl-D) of the arrow and move/rotate
(Alt-mouse or Ctrl-mouse IIRC -- press the key and watch the statusbar)
them to wherever you need.

I also used inkscape some time ago and I found it very good. It took me
a while to get used to it though (and I'm not claiming I'm an artist.)

--
Alvaro Herrera (<alvherre[@]dcc.uchile.cl>)
Criptografía: Poderosa técnica algorítmica de codificación que es
empleada en la creación de manuales de computadores.

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On Mon, 28 Mar 2005, Jim C. Nasby wrote:

> It'd probably be helpful to include this info in a document to go along
> with the image.

I'll do this unless more experienced (Bruce, Elein) writers do that.


>
> On Mon, Mar 28, 2005 at 07:16:23PM +0400, Oleg Bartunov wrote:
>> On Mon, 28 Mar 2005, Mark Woodward wrote:
>>
>>>> Hi there,
>>>>
>>>> while learning inkscape I did a sketch of picture describing
>>>> history of relational databases. It's available from
>>>> http://mira.sai.msu.su/~megera/pgsql/
>>>
>>> Is there a direct line from INGRES to Postgres? I was under the impression
>>> that Postgres is a "new" lineage started after INGRES sharing little or no
>>> code.
>>
>> No code sharing, but only Stonebraker and his ideas about extensibility,
>> objects and lessons learned after Ingres, so it's named Postgres.
>>
>>
>>>
>>> The line from Ingres through RDb, Oracle, to Informix seems to indicate a
>>> lineage. Is there one? Is Oracle based, in some way, on INGRES?
>>>
>>
>> No, line just crossing Oracle which bought Rdb/VMS. I'll adjust picture.
>>
>>
>>> IS there a relation between IBM System R and INGRES or is that just a
>>> placement issue?
>>
>> No, I placed them close to underline their importance for relational
>> databases.
>>
>>>
>>> What is the raltionship between System R and SQL and DB2?
>>
>> Sure. System R was a research project of IBM
>> SEQUEL is a language designed to work with data stored in System R.
>> SEQUEL was renamed to SQL then because there was existed trademark.
>> IBM developes SQL/DS database which then became DB2.
>>
>>>
>>> What does Agatha Christie have do do with anything? (Other than having
>>> Hecule investigate the death of SCO.)
>>>
>>
>> "elephants can remember" - elephant here is a keyword
>>
>> IIRC, it was this proposal for postgresql logo
>> http://www.pgsql.ru/db/mw/msg.html?mid=1238939
>>
>> We used jaguar(leopard) before (famous postgresql empowered).
>> I don't remember who was the first author of Elephant logo.
>>
>>
>>> While it is interesting, there seems to be implied connections by
>>> proximity, and I'm not sure of the explicit connections by line. You'll
>>> need some references.
>>
>> I tried to separate INGRES family by color (color hue)
>> Bright red - is for IBM family (probably wrong color)
>> Oracle is closer to IBM, because they both used SQL,
>> while INGRES family use QUEL at the beginning.
>>
>> Ilustra was bought by Informix, which was bought by IBM and
>> incorporated into DB2, that's why they are close.
>>
>> Illustra is a commercialized Postgres (1992), that's why there is line
>> connecting them.
>>
>> Sybase (Sybase SQL Server) and MS SQL are close because until 1992 there
>> was Sybase and license
>> agreement with Microsoft, which ported Sybase to Windows NT. In 1993
>> Microsoft rebranded Sybase and named MS SQL. Sybase in 1995 released v 11.0
>> and
>> renamed them to ASE to be distinct from MS SQL.
>>
>>
>> As I wrote, I'm not sure I got everything right, so any corrections are
>> welcome. If you improve my picture (get .svg and inkscape), then I'd
>> be glad to have it. The reason I made this picture not just learning
>> inkscape (great program!), I tried to show the place of PostgreSQL
>> between all major databases.
>>
>>
>> Regards,
>> Oleg
>> __________________________________________________ ___________
>> Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
>> Sternberg Astronomical Institute, Moscow University (Russia)
>> Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
>> phone: +007(095)939-16-83, +007(095)939-23-83
>>
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>
>

Regards,
Oleg
__________________________________________________ ___________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83

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On Mon, 28 Mar 2005, Alvaro Herrera wrote:

> On Mon, Mar 28, 2005 at 07:24:24PM +0400, Oleg Bartunov wrote:
>> On Mon, 28 Mar 2005, Alvaro Herrera wrote:
>>
>>> On Mon, Mar 28, 2005 at 10:09:19AM +0400, Oleg Bartunov wrote:
>>>> On Sun, 27 Mar 2005, Jim C. Nasby wrote:
>>>>
>>>>> Maybe it's just me, but it's pretty hard to read, especially at the top.
>>>>
>>>> what do you mean ? Too crowdy or text is too small ?
>>>
>>> I found it a little confusing. Do the lines go one way or the other?
>>> Maybe sticking arrowheads could explain that. Also, is there a
>>
>> Hey, I learn inkscape only 1 day, I don't know how to create arrows.
>
> Hmm. I think you could create a triangle using the "star" tool, and
> stick a straight line to it. Then make a group of both (Ctrl-G IIRC).
> Then you can make duplicates (Ctrl-D) of the arrow and move/rotate
> (Alt-mouse or Ctrl-mouse IIRC -- press the key and watch the statusbar)
> them to wherever you need.

I found a lot arrows in "Stroke style" of "Fill and Stroke" dialog.

>
> I also used inkscape some time ago and I found it very good. It took me
> a while to get used to it though (and I'm not claiming I'm an artist.)
>

I got only one core dump
>

Regards,
Oleg
__________________________________________________ ___________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83

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