[QUANTITY] Plea for pragmatism

[Ed Shaya]

Example V somehow lost a line.  It is added back here.

>
> I. Extracting simple measurements with errors.  Ensure they have
> errors and are associated to objects that may be associated with
> higher level objects, clusters.
>
>    #Obtain Iron abundances [Fe/H] for stars in M92.
>
> II. Extracting object holders of properties.  Here we ensure
> bi-directionality of above associations.  And introduce a comparison
> quantity. And we need to hold intermediate arrays and
> the averages of these arrays.  The output is an array of objects,
> (GCs).
> #Find globular clusters whose stars have average iron abundance < 0.25.
>
> III. Include conditional items in search.
>
>    #Same as above but only use cases where more than 2 Iron
>    lines were included in the analsys.  
> IV. Extracting meta-data quantity.
>
>    #Obtain the assumed Iron transition probabilities assumed in
>    previous example.
>
> V. Extracting line identifications, confidence level etc
>        #Obtain which lines have been identified in far UV in the
>     ISM, their intensities, confidence levels, and central wavelengths.
>
>
> VI. Extracting 2-d data.  One expects either single aperture or CCD
> data, and everything should carry along errors and quality
> assesments.  Of course the aperture location and pixel sizes must be
> carried as well.
>
>    #Obtain 350 micron emission data of Sgr B2 (galactic center object)
>    that have resolution < 20".


> VII. Extracting 3-d data.
>    #Obtain, for region XXX, microwave background data from WMAP
>    in all spectral channels in regions excluding known
>    galaxies (using the V=25th mag/sq" surface brightness
>    contour).
>
> VIII. Extracting vectors.
>    #Obtain from N-body simulation XXX, using mass points in
>    halos at the present time, the center of mass motion of each
>    galaxy+recent infall components at z=5.
>
> IX. Extracting tensors.
>    #Assuming all clusters in the Abell Catalog have mass of
>    1E14 solar masses, calculate how the acceleration vector
>    increases with distance from the Milky Way in each of the
>    3 cartesian coordinates.
>
> X. Instrument as Objects.
>    #Find a spectragraph at a major observatory with dispersion 
> <100A/px and throughput
>    better than 20% over the region 3500-4000A.  Display the throughput 
> curve for
>    each of these.
>
>