# Meme Database: Early Draft Documentation

## provided by The Scientific Programming Group

### UCO / Lick Observatory


% Modified 10 May 96
%
% This form may be retrieved via anonymous ftp from ftp.cv.nrao.edu in
%
% This form is based on the electronic form used by the AAS for their
% meeting abstracts.  We would like to thank the AAS for their permission
% to use their form and other files for the ADASS Conference.

%
% ABSTRACT AND DEMO SUBMISSIONS DEADLINE:  15 July 1996 (Midnight EST)
% EMAIL COMPLETED FORM TO: adass96@nrao.edu
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%                  NRAO
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% Please fill out one copy of this form for each abstract or computer demo
% that you plan to present at the Conference.  If the abstract and computer
% demo are to be considered as one unit then one form may be used, and only
% the demo fee must be paid.

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\nofiles

% Administrative information.  Some of this information is required,
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% Optional items that are desired or called for by virtue of choices
% made should by uncommented (by having the "%" deleted).

\firstauthor{D.A. Clarke}          % REQUIRED - MUST BE THE PRESENTING AUTHOR

% Author contact information.
%
\authoraddress{UCO/Lick Observatory\\University of California\\Santa Cruz, CA 95064}
%                       Mailing address of the first author.  Note that
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%                       Phone number of first author.  Please delimit
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\authoremail{de@ucolick.org}
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%                       address, preferably in Internet format
%                       (user@host.domain), rather than a series of
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%\authorphone{}          % REQUIRED
%\authorfax{}            % REQUIRED
%\authoremail{}          % REQUIRED

% Type of presentation:
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%    \sessiontype{TYPE} indicates your preference for the presentation
%                       of the paper.  Computer demos are generally not
%                       considered abstracts unless indicated as such here.
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%\sessiontype{poster}
\sessiontype{oral}
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%\sessiontype{poster, computer demo}

%    \instructions{TEXT}
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%                       If you require special equipment for your presentation
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\begin{document}

% Those people presenting computer demos only are invited to give a short
% description of their demo for the program.  These descriptions will not
% be included as abstracts unless they were indicated as such above.
%
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%    \author{Name(s)}
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% An author list that looks like this:
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%    P.B.Boyce, H.Dalterio (AAS), C.D.Biemesderfer (NOAO),
%    R.J.Hanisch (STScI), J.Johnson (AAS)
%
% would be specified like this:
%
%    \author{P.B.Boyce, H.Dalterio}
%    \affil{AAS}
%    \author{C.D.Biemesderfer}
%    \affil{NOAO}
%    \author{R.J.Hanisch}
%    \affil{STScI}
%    \author{J.Johnson}
%    \affil{AAS}
%
% Notice that the author should supply a minimum of punctuation.
%
% The abstract itself belongs in a LaTeX abstract environment, which is
% set up by these two statements.  Abstract should not exceed 1/2 page in
% length.
%
%    \begin{abstract}
%    \end{abstract}

\title{Practical applications of a relational FITS keyword database}
\author{D.A. Clarke, S.L. Allen}
\affil{UCO/Lick Observatory}
%\author{}
%\affil{}
\begin{abstract}
In the course of designing a major mosaicked instrument we need
tools to manage the large set of FITS keywords required for instrument
control and data reduction/archiving.  We have therefore constructed a
relational database schema which describes FITS keywords
(and have implemented it using Sybase).  In this schema FITS keywords
and structures are entities, having attributes such as format, units,
datatype, minimum and maximum value, semantics, etc.

This schema can be used to store and document any legitimate FITS keyword
from any source.  Sources or applications of keywords are described
as contexts''.  Thus it is possible to establish families of FITS keywords,
e.g. UCO/Lick, Keck, NOAO, IRAF, or instrument-specific keywords.

Separate code modules produce, from this database, HTML or LaTeX
source code.  If changes are made during an instrument development
project, or over the lifetime of a FITS keyword, new documentation and
reader/writer code can be produced automatically.  FITS namespace
collisions can be easily detected; though the context mechanism makes
them nonfatal, the user might wish to avoid them.

Keywords with tuple values, and indexed keywords (whose instantiation
is controlled by a counter such as NAXIS), can be described
consistently and accurately.
Keywords with enumerated values can be explicitly and fully documented,
as can the sub-semantics and sub-formats of tuple keywords.
Pseudo-keywords can be used to specify fully both table
We demonstrate the application of
this database to documentation and development for DEIMOS, HIRES,
and other Keck and UCO/Lick instruments.
The keyword database also serves some project
management/specification/design functions.

\end{abstract}

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\end{document}

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