AML (astronomical markup language) DTD
From: http://www.infm.ulst.ac.uk/~damien/these/AML.dtd
Date:  19980428

<!-- AML (astronomical markup language) DTD, version 0.23 -->
<!-- last modified: 1998-3-30 -->

<!ELEMENT aml (metadata | aobject | article | tables | table |
               image | fits | person)+ >

<!ELEMENT metadata   (amlver | source | title | creator | date | identifier)+ >
<!-- informations about the AML file -->

<!ELEMENT amlver     (#PCDATA) >
<!-- version of AML. Format: NN.NN -->

<!ELEMENT source     (#PCDATA) >
<!-- origin of the file (server, institute, ...). Format: name. Searchable -->

<!ELEMENT title      (#PCDATA) >
<!-- title of the file. Format: ASCII. Searchable -->

<!ELEMENT creator    (#PCDATA) >
<!-- creator of the file. Format: name . Searchable -->

<!ELEMENT date       (#PCDATA) >
<!-- date of the file. Format: YYYY-MM-DD (ISO 8601). Searchable -->

<!ELEMENT glu        (param*) >
<!-- GLU. For info, see http://simbad.u-strasbg.fr/demo/glu.html -->
<!ATTLIST glu
    actionname     CDATA                                 #IMPLIED
    datatypename   CDATA                                 #IMPLIED
    alt            CDATA                                 #IMPLIED >
<!ELEMENT param      (#PCDATA) >
<!ATTLIST param
    name           CDATA                                 #REQUIRED
    value          CDATA                                 #REQUIRED >

<!ELEMENT identifier (glu | #PCDATA) >
<!-- unique identifier for the file. Format: GLU, URL or URN. Searchable -->


<!ELEMENT aobject    (identifier?, idents, (coord | objtype | morpho | radvelo |
                      pmotions | dim | mag | spec | oriangl | selident | bhext |
                      otherdata)*, lmeasurements?, refs?) >
<!-- astronomical object -->

<!-- identifier already defined -->
<!ELEMENT idents     (ident+) >
<!ELEMENT ident      (#PCDATA) >
<!-- astronomical identifier. Format: see
"http://vizier.u-strasbg.fr/cgi-bin/Dic". Searchable -->

<!ELEMENT coord      (ra, dec) >
<!-- Searchable -->
<!ATTLIST coord
    coosystem     (galactic | ecliptic | equatorial)    #REQUIRED
    equinox        CDATA                                 #REQUIRED
    format         CDATA                                 #REQUIRED
    uncmaj         CDATA                                 #IMPLIED
    uncmin         CDATA                                 #IMPLIED
    uncang         CDATA                                 #IMPLIED
    ref            CDATA                                 #IMPLIED>
<!-- equinox: year (integer) -->
<!-- format: see"http://cdsweb.u-strasbg.fr/iau-spec.html#sec3.2.1":
"Coordinates shall be specified as LLL.ll+BB.bb or LLL.ll-BB.bb for galactic coordinates, and as
HHMMSS.ss+DDMMSS.s or HHMMSS.ss-DDMMSS.s for equatorial coordinates (without spaces); more or fewer
fractional digits may be used as appropriate." -->
<!-- uncmaj/uncmin/uncang: 95% confidence ellipse (2.5 sigma) -->
<!-- ref: bibcode associated -->
<!ELEMENT ra         (#PCDATA) >
<!ELEMENT dec        (#PCDATA) >

<!ELEMENT objtype   (#PCDATA) >
<!-- see "http://newb6.u-strasbg.fr/~guillaum/types_sim". Searchable -->

<!ELEMENT morpho     (#PCDATA) >
<!-- can anybody help me finding a standard classification online ? -->

<!ELEMENT radvelo   (#PCDATA) >
<!ATTLIST radvelo
    unit          (kmps | mps | z)    #REQUIRED
    uncert        CDATA               #IMPLIED
    ref           CDATA               #IMPLIED>
<!-- Searchable -->

<!ELEMENT pmotions   (#PCDATA) >
<!ATTLIST pmotions
    unit          CDATA               #REQUIRED
    uncert        CDATA               #IMPLIED
    ref           CDATA               #IMPLIED>

<!ELEMENT dim        (#PCDATA) >
<!-- Object dimensions. Format: major_axis x minor_axis -->
<!ATTLIST dim
    unit          (deg | arcsec | arcmin)    #REQUIRED
    uncert        CDATA                      #IMPLIED >

<!ELEMENT mag        (#PCDATA) >
<!ATTLIST mag
    filter        (CDATA | U | B | V | R | I | unknown)    #REQUIRED >

<!ELEMENT spec       (#PCDATA) >
<!-- spectral class, for stars -->

<!ELEMENT oriangl   (#PCDATA) >
<!ATTLIST oriangl
    unit          (deg)                      #REQUIRED >

<!ELEMENT selident  (#PCDATA) >
<!-- selected identification (see element ident above). Searchable -->

<!ELEMENT bhext     (#PCDATA) >
<!-- Burstein-Heiles extinction in B mag -->

<!ELEMENT otherdata (#PCDATA) >
<!ATTLIST otherdata
    type          CDATA                      #REQUIRED >

<!ELEMENT lmeasurements   (measurements+) >
<!ELEMENT measurements    (measurement+) >
<!ATTLIST measurements
    what          CDATA                      #REQUIRED >
<!ELEMENT measurement     (#PCDATA) >
<!ATTLIST measurement
    value         CDATA                      #REQUIRED
    unit          CDATA                      #REQUIRED
    unc           CDATA                      #REQUIRED
    ref           CDATA                      #REQUIRED >

<!ELEMENT refs    (ref+) >
<!ELEMENT ref        (#PCDATA) >
<!-- a reference should always be a bibcode -->


<!ELEMENT article    (identifier?, bibcode, (authors | arttitle | publtown |
                     publication | publdate | nofirstpage | nbpages | keywords |
                     summary | linkobjs)* ) >
<!-- identifier already defined -->
<!ELEMENT bibcode        (#PCDATA) >
<!-- Searchable -->
<!ELEMENT authors        (author+) >
<!ELEMENT author         (#PCDATA) >
<!-- Searchable -->
<!ELEMENT arttitle      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT publtown      (#PCDATA) >
<!ELEMENT publication    (#PCDATA) >
<!-- Searchable -->
<!ELEMENT publdate      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT nofirstpage  (#PCDATA) >
<!ELEMENT nbpages       (#PCDATA) >
<!ELEMENT keywords       (keyword+) >
<!-- Searchable -->
<!ELEMENT keyword        (#PCDATA) >
<!ELEMENT summary        (#PCDATA) >
<!ELEMENT linkobjs       (linkobj+) >
<!ELEMENT linkobj        (#PCDATA) >
<!-- astronomical object identifier. Searchable -->


<!ELEMENT tables       (identifier?, tabsdescr?, ref?, authors?, keywords?,
                        table+) >
<!-- identifier already defined -->
<!ELEMENT tabsdescr      (#PCDATA) >
<!-- Searchable -->
<!-- ref already defined -->
<!-- authors already defined -->
<!-- keywords already defined (Very Much Searchable!)-->

<!ELEMENT table        (identifier?, tabtitle, tabdescr?, ref?, colheaders,
                       rowheaders?, (rows | tablebinfile)) >
<!ATTLIST table
    name           CDATA               #REQUIRED
    nbcols         CDATA               #REQUIRED
    nbrows         CDATA               #IMPLIED >
<!-- identifier already defined -->
<!ELEMENT tabtitle      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT tabdescr      (#PCDATA) >
<!-- Searchable -->
<!-- ref already defined -->
<!ELEMENT colheaders    (colheader+) >

<!ELEMENT colheader     (colname, coltitle, coldescr, colunit?, colformat,
                         bytes?) >
<!ELEMENT colname      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT coltitle      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT coldescr      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT colunit       (#PCDATA) >
<!ELEMENT colformat     (#PCDATA) >
<!ELEMENT bytes     (#PCDATA) >

<!ELEMENT rowheaders    (rowheader+) >
<!ELEMENT rowheader     (rowname, rowtitle, rowdescr, rowunit?, rowformat) >
<!ELEMENT rowname      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT rowtitle      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT rowdescr      (#PCDATA) >
<!-- Searchable -->
<!ELEMENT rowunit       (#PCDATA) >
<!ELEMENT rowformat     (#PCDATA) >

<!ELEMENT rows           (row+) >
<!ELEMENT row            (cell+) >
<!ELEMENT cell           (#PCDATA) >
<!-- a big table should be placed in a binary file, with its
metadata in the AML file. The link is done with the following tag -->
<!ELEMENT tablebinfile (#PCDATA) >
<!ATTLIST tablebinfile
    filename              CDATA          #REQUIRED >


<!ELEMENT image   (improp | filehist | referenc | comments | observations |
                   imbinfile )+ >
<!-- mostly FITS keywords (see after), but only for images -->
<!ELEMENT improp   (bitpix, naxis, naxisn*, datamin, datamax) >
<!ELEMENT filehist (date | origin | blocked)+ >
<!ELEMENT comments (comment | history)+ >
<!ELEMENT observations (date-obs | telescop | instrume| observer | object |
                        equinox | epoch |
                        time | camnum | ccd-id | eperadu | focallen |
                        ccdangle | pixeldim | bandpass | filter | coord |
                        airmass | exptime | rnoise | temp)+ >


<!ELEMENT fits    (identifier | bitpix | naxis | naxisn | extend | date | origin |
                   blocked | author | referenc | comment | history |
                   date-obs | telescop | instrume | observer | object |
                   equinox | epoch |
                   xtension | groups | pcount | gcount | tfields |
                   tbcoln | tformn |
                   bscale | bzero | bunit | blank | ctypen | crpixn |
                   crotan | crvaln | cdeltn | datamax | datamin |
                   extname | extver | extlevel |
                   tscaln | tzeron | tnulln | ttypen | tunitn | tdispn |
                   tdimn | theap | ptypen | pscalen | pzeron |
                   time | filename | compress | camnum | ccd-id | eperadu |
                   focallen | ccdangle | pixeldim | bandpass | filter|
                   coord | airmass | exptime | rnoise | temp | imbinfile
                  )+ >
<!-- see FITS documentation: "http://www.cv.nrao.edu/fits/" -->

<!-- identifier already defined -->
<!ELEMENT bitpix	 (#PCDATA) >
<!ELEMENT naxis		 (#PCDATA) >
<!ELEMENT naxisn	 (#PCDATA) >
<!ATTLIST naxisn
		n	CDATA		#REQUIRED >
<!ELEMENT extend	 (#PCDATA) >
<!-- date already defined. Searchable -->
<!ELEMENT origin	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT blocked	 (#PCDATA) >
<!-- author defined above -->
<!ELEMENT referenc	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT comment	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT history	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT date-obs	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT telescop	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT instrume	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT observer	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT object	 (#PCDATA) >
<!-- Searchable -->
<!ELEMENT equinox	 (#PCDATA) >
<!ELEMENT epoch		 (#PCDATA) >

<!ELEMENT xtension	 (#PCDATA) >
<!ELEMENT groups	 (#PCDATA) >
<!ELEMENT pcount	 (#PCDATA) >
<!ELEMENT gcount	 (#PCDATA) >
<!ELEMENT tfields	 (#PCDATA) >
<!ELEMENT tbcoln	 (#PCDATA) >
<!ELEMENT tformn	 (#PCDATA) >
<!ATTLIST tformn
		n	CDATA		#REQUIRED >

<!-- Array -->
<!ELEMENT bscale	 (#PCDATA) >
<!ELEMENT bzero		 (#PCDATA) >
<!ELEMENT bunit		 (#PCDATA) >
<!ELEMENT blank		 (#PCDATA) >
<!ELEMENT ctypen	 (#PCDATA) >
<!ATTLIST ctypen
		n	CDATA		#REQUIRED >
<!ELEMENT crpixn	 (#PCDATA) >
<!ATTLIST crpixn
		n	CDATA		#REQUIRED >
<!ELEMENT crotan	 (#PCDATA) >
<!ATTLIST crotan
		n	CDATA		#REQUIRED >
<!ELEMENT crvaln	 (#PCDATA) >
<!ATTLIST crvaln
		n	CDATA		#REQUIRED >
<!ELEMENT cdeltn	 (#PCDATA) >
<!ATTLIST cdeltn
		n	CDATA		#REQUIRED >
<!ELEMENT datamax	 (#PCDATA) >
<!ELEMENT datamin	 (#PCDATA) >

<!ELEMENT extname	 (#PCDATA) >
<!ELEMENT extver	 (#PCDATA) >
<!ELEMENT extlevel	 (#PCDATA) >

<!ELEMENT tscaln	 (#PCDATA) >
<!ATTLIST tscaln
		n	CDATA		#REQUIRED >
<!ELEMENT tzeron	 (#PCDATA) >
<!ATTLIST tzeron
		n	CDATA		#REQUIRED >
<!ELEMENT tnulln	 (#PCDATA) >
<!ATTLIST tnulln
		n	CDATA		#REQUIRED >
<!ELEMENT ttypen	 (#PCDATA) >
<!ATTLIST ttypen
		n	CDATA		#REQUIRED >
<!ELEMENT tunitn	 (#PCDATA) >
<!ATTLIST tunitn
		n	CDATA		#REQUIRED >
<!ELEMENT tdispn	 (#PCDATA) >
<!ATTLIST tdispn
		n	CDATA		#REQUIRED >
<!ELEMENT tdimn		 (#PCDATA) >
<!ATTLIST tdimn
		n	CDATA		#REQUIRED >
<!ELEMENT theap		 (#PCDATA) >
<!ELEMENT ptypen	 (#PCDATA) >
<!ATTLIST ptypen
		n	CDATA		#REQUIRED >
<!ELEMENT pscalen	 (#PCDATA) >
<!ATTLIST pscalen
		n	CDATA		#REQUIRED >
<!ELEMENT pzeron	 (#PCDATA) >
<!ATTLIST pzeron
		n	CDATA		#REQUIRED >

	<!-- not in FITS standard (maybe from ESO) -->
<!ELEMENT time		 (#PCDATA) >
<!ELEMENT filename	 (#PCDATA) >
<!ELEMENT compress	 (#PCDATA) >
<!ELEMENT camnum	 (#PCDATA) >
<!ELEMENT ccd-id	 (#PCDATA) >
<!ELEMENT eperadu	 (#PCDATA) >
<!ELEMENT focallen	 (#PCDATA) >
<!ELEMENT ccdangle	 (#PCDATA) >
<!ELEMENT pixeldim	 (#PCDATA) >
<!ELEMENT bandpass	 (#PCDATA) >
<!ELEMENT filter	 (#PCDATA) >
<!-- coord defined above -->
<!ELEMENT airmass	 (#PCDATA) >
<!ELEMENT exptime	 (#PCDATA) >
<!ELEMENT rnoise	 (#PCDATA) >
<!ELEMENT temp		 (#PCDATA) >

<!ELEMENT imbinfile	(#PCDATA) >
<!ATTLIST imbinfile
		filename	CDATA		#REQUIRED >


<!-- person working in astronomy (usually an author) -->
<!ELEMENT person   (lastname, firstname?, firstname2?, firstname3?,
                    affiliation?, job-title?,
                    address?, tel?, fax?, email?, homepage?, keywords?,
		    refs?,
                    linkarts?, linktabs?, linkobjs?, linkimgs? ) >
<!ELEMENT lastname       (#PCDATA) >
<!ELEMENT firstname1      (#PCDATA) >
<!-- firstnames can be abbreviated by the first character and a dot -->
<!ELEMENT firstname2     (#PCDATA) >
<!ELEMENT firstname3     (#PCDATA) >
<!ELEMENT affiliation    (#PCDATA) >
<!ELEMENT job-title      (#PCDATA) >
<!ELEMENT address        (#PCDATA) >
<!ELEMENT tel            (#PCDATA) >
<!ELEMENT fax            (#PCDATA) >
<!ELEMENT email          (#PCDATA) >
<!ELEMENT homepage       (#PCDATA) >
<!-- homepage URL -->
<!-- keywords already defined. Research Interests -->
<!-- refs already defined. Articles written -->
<!ELEMENT linkarts      (linkart+) >
<!-- published articles -->
<!ELEMENT linkart        (#PCDATA) >
<!ELEMENT linktabs       (linktab+) >
<!-- the person is an author of these tables -->
<!ELEMENT linktab        (#PCDATA) >
<!-- linkobjs already defined. Special interest for these objects -->
<!ELEMENT linkimgs       (linkimg+) >
<!-- taken images -->
<!ELEMENT linkimg        (#PCDATA) >