added tag defintions

tag_definitions.txt

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+Person
+  A named person or their initials
+  Example: Andrea M. Ghez, Ghez A.
+
+Organization
+  A named organization that is not an observatory.
+  Example: NASA, University of Toledo
+
+Location
+  A named location on Earth.
+  Example: Canada
+
+Entity of Future Interest
+  A general catch all for things that may be worth thinking about in the future. Often terms related to gravitational waves.
+
+Observatory
+  A, often similarly located, group of telescopes.
+  Example: Keck Observatory, Fermi
+
+Telescope
+  A "bucket" to catch light.
+  Example: Hubble Space Telescope, Discovery Channel Telescope
+
+Instrument
+  A device, often, but not always, placed on a telescope, to make a measurement.
+  Example: Infrared Array Camera, NIRCam
+
+Wavelength
+  A portion of the electromagnetic spectrum. Can be communicated as a particular wavelength, a name, or a particular transition.
+  Example: 656.46 nm, H-alpha
+
+Archive
+  A curated collection of the literature or data. Very similar to Database.
+  Example: NASA ADS, MAST
+
+Collaboration
+  An organizational entity containing multiple organizations, observatories, and/or countries.
+  Example: the Plank Collaboration
+
+Survey
+  An organized search of the sky often dedicated to large scale science projects.
+  Example: 2MASS, SDSS
+
+Grant
+  An allocation of money and/or time for a research project.
+  Example: grant No. 12345, ADAP grant 12345
+
+Fellowship
+  A grant focused towards students and/or early career researchers.
+  Example: Hubble Fellowship
+
+Database
+  A curated set of data. Very similar to Archive.
+  Example: Simbad database
+
+Citation
+  A reference to previous work in the literature.
+  Example: Allen et al. 2012
+
+Celestial Object
+  A named object in the sky
+  Example: ONC, Andromeda galaxy
+
+Celestial Region
+  A defined region projected onto the sky, or celestial coordinates.
+  Example: GOODS field, l=2, b=15.
+
+Celestial Object Region
+  A named area on/in a celestial body.
+  Example: Inner galaxy
+
+Event
+  A conference, workshop or other event that often brings scientests together.
+  Example: Protostars and Planets VI
+
+Formula
+  Mathematical formula or equations.
+  Example: F = Gm1m2/r^2, z=2.3
+
+URL
+  A link to a website.
+  Example: https://www.astropy.org/
+
+Identifier
+  A unique identifier for data, images, etc.
+  Example: ALMA 123.12345
+
+Tag
+  A HTML tag.
+  Example: <bold><\bold>
+
+Text Garbage
+  Incorrect text, often multiple punctuation marks with no inner text.
+  Example: ,,,
+
+