<?xml version="1.0" encoding="UTF-8"?>
<!--Defines the spase as a collection of information about a data set -->
<!-- NJP Sept 29, 2006   BASED ON SPASE Version 1.1.0  --> 

<!--doc:   Space Physics Archive Search and Extract
        (SPASE). The outermost container or
        envelope for SPASE metadata. This
        indicates the start of the SPASE
        metadata.-->
<!ELEMENT SPASE (VERSION, CATALOG*, DISPLAYDATA*, NUMERICALDATA*, GRANULE*, INSTRUMENT*, OBSERVATORY*, PERSON*, REGISTRY*, REPOSITORY*, SERVICE*) >

<!--doc:  A tabular listing of events or
        observational notes, especially those
        that have utility in aiding a user in
        locating data. Catalogues include lists
        of events, files in a product, and data
        availability. -->      
<!ELEMENT CATALOG (RESOURCEID, RESOUCEHEADER, ACCESSINFORMMATION, PROVIDERRESOURCENAME?, PROVIDERVERSION?,
                INSTRUMENTID*, PHENOMENONTYPE, TIMESPAN?, CAVEATS?, KEYWORD*, INPUTRESOURCEID+)  >
                
<!--doc: Attributes of a resource which pertain
        to the provider of the resource and
        descriptive information about the
        resource.  -->        
<!ELEMENT RESOURCEHEADER (RESOURCENAME, ALTERNATENAME*, RELEASEDATE, DESCRIPTION, ACKNOWLEDGEMENT?, CONTACT, INFORMATIONURL*, ASSOCIATIONID*) >

 <!--doc: The person or organization who may be
        able to provide special assistance or
        serve as a channel for communication for
        additional information about a resource. -->
<!ELEMENT CONTACT ( PERSONID, ROLE+)>

<!--doc: Attributes of the method of acquiring
        additional information. -->
<!ELEMENT INFORMATIONURL (NAME?, URL, DESCRIPTION?) >

<!--doc: Attributes of the resource which pertain
        to how to acquire the resource,
        availability and storage format. -->
<!ELEMENT ACCESSINFORMATION (REPOSITORYID, AVAILABILITY?, ACCESSRIGHTS?, ACCESSURL+, FORMAT, ENCODING?, ACKNOWLEDGEMENT?) >

<!--doc: Attributes of the method of acquiring
        additional information. -->
<!ELEMENT ACCESSURL (NAME?, URL, DESCRIPTION?) >

<!--doc:  The duration of an interval in time. -->
<!ELEMENT TIMESPAN (STARTDATE, ENDDATE?, RELATIVEENDDATE?) >

<!--doc:    -->
<!ELEMENT ACCESSRIGHTS (OPEN | RESTRICTED) >
<!ELEMENT OPEN EMPTY >
<!ELEMENT RESTRICTED EMPTY >

<!--doc:  A graphical representation of data
        wherein the underlying numeric values
        are not (readily) accessible for
        analysis.. Examples are line plots and
        spectrograms. -->
<!ELEMENT DISPLAYDATA (RESOURCEID, RESOURCEHEADER, ACCESSINFORMATION, PROVIDERRESOURCENAME?, PROVIDERPROCESSINGLEVEL?, 
                        PROVIDERVERSION?, INSTRUMENTID, MEASUREMENTTYPE+, TEMPORALDESCRIPTION?, SPECTRALRANGE*, DISPLAYCADENCE?,
                        INSTRUMENTREGION*, OBSERVEDREGION*, CAVEATS?, KEYWORD*, INPUTRESOURCEID* ) >

<!--doc:  A characterization of the time over
        which the measurement was taken. -->
<!ELEMENT TEMPORALDESCRIPTION (TIMESPAN, CADENCE?, EXPOSURE?) >

<!--doc:  Data stored as numerical values in a
        specified format. -->
<!ELEMENT NUMERICALDATA (RESOURCEID, RESOURCEHEADER, ACCESSINFORMATION, PROVIDERRESOURCENAME?, PROVIDERPROCESSINGLEVEL?, PROVIDERVESION?, 
                        INSTRUMENTID, MEASUREMENTYPE+, TEMPORALDESCRIPTION?, SPECTRALRANGE*, INSTRUMENTREGION*, OBSERVEDREGION*, CAVEATS?,
                        KEYWORD*, INPUTRESOURCEID*, PHYSICALPARAMETER+ ) >

<!--doc:  A container of information regarding a
        parameter whose values are part of the
        product. Every product contains or can
        be related to one or more parameters. -->
<!ELEMENT PHYSICALPARAMETER (NAME?, PARAMETERKEY, DESCRIPTION?, CAVEATS?, CADENCE?, UNITS?, UNITCONVERSION?, COORDINATESYSTEM?, DIMENSION?,
                            MEASURED?, SUPPORT? ) >

<!--doc:  Specification of the origin and
        orientation of axes against which the
        location of some point is given and the
        representative form of each point. -->
<!ELEMENT COORDINATESYSTEM (COORDINATESYSTEMREPRESENTATION?, COORDINATESYSTEMNAME? ) >

<!--doc:  Attributes of an independent variable or
        axis associated with the data. -->
<!ELEMENT DIMENSION (SIZE, DESCRIPTION) >

<!--doc: Attributes of observations obtained from
        an instrument or sensor. -->
<!ELEMENT MEASURED (FIELD?, PARTICLE?, PHOTON?, MIXED?) >

<!--doc: The space around a radiating body within
        which its electromagnetic attributes can
        exert force on another similar body that
        is not in direct contact.-->
<!ELEMENT FIELD (ORIENTATION?, FIELDQUALIFIER*, FIELDQUANTITY) >
<!ELEMENT FIELD_QUANTITY (MAGNETIC | ELECTRIC | POTENTIAL | POYNTING_FLUX | CROSS_SPECTRUM) >

<!ELEMENT MAGNETIC EMPTY >
<!ELEMENT ELECTRIC EMPTY >
<!ELEMENT POTENTIAL EMPTY >
<!ELEMENT POYNTING_FLUX EMPTY >
<!ELEMENT CROSS_SPECTRUM EMPTY >

<!ELEMENT FIELD_QUALIFIER (VECTOR | COMPONENT | MAGNITUDE | PERPENDICULAR | VARIANCE | PEAK 
        | AVERAGE | DEVIATION )  >

<!-- VECTOR already defined -->
<!ELEMENT COMPONENT EMPTY >
<!ELEMENT MAGNITUDE EMPTY >
<!ELEMENT PERPENDICULAR EMPTY >
<!-- VARIANCE already defined -->
<!-- PEAK already defined -->
<!-- AVERAGE already defined -->
<!ELEMENT DEVIATION EMPTY >


<!ELEMENT FIELD_VARIABLES (#PCDATA) >

<!--doc: A description of the types of particles
        observed in the measurement. This
        includes both direct observations and
        inferred observations -->
<!ELEMENT PARTICLE (PARTICLETYPE+, PARTICLEQUALIFIER*, PARTICLEQUANTITY, ATOMICNUMBER*, ENERGYRANGE?, AZIMUTHALANGLERANGE?, POLARANGLERANGE?) >

<!--doc: The minimum and maximum energy values of
        the particles represented by a given
        physical parameter description. -->
<!ELEMENT ENERGYRANGE (LOW, HIGH?, UNITS, BIN*) >

<!--doc: A grouping of observations according to
        a band or window of a common attribute. -->
<!ELEMENT BIN (LOW, HIGH) >

<!--doc: The range of possible azimuthal angles
        for a group of energy observations. 
        Default units are degrees. -->
<!ELEMENT AZIMUTHALANGLERANGE (LOW, HIGH, UNITS?, BIN*)  >

<!--doc: The range of possible polar angles for a
        group of energy observations. Defaults
        units are degrees. -->
<!ELEMENT POLARANGLERANGE (LOW, HIGH, UNITS?, BIN?) >

<!--doc: Photon (radio through gamma-rays): the
        fundamental particle or quantum of
        electromagnetic radiation (radiant
        energy) -->
<!ELEMENT PHOTON (PHOTONQUALIFIER*, PHOTONQUANTITY, FREQUENCYRANGE?) >
<!ELEMENT  PHOTON_QUANTITY (POLARIZATION | INTENSITY | FLUX | VELOCITY | LINEDEPTH | EQUIVALENTWIDTH 
            | STOKESPARAMETER | EMISSIVITY | MODEAPPLITUDE) >          
<!ELEMENT POLARIZATION EMPTY>
<!ELEMENT INTENSITY EMPTY>
<!ELEMENT FLUX EMPTY>
<!ELEMENT VELOCITY EMPTY>
<!ELEMENT LINEDEPTH EMPTY>
<!ELEMENT EQUIVALENTWIDTH EMPTY>
<!ELEMENT STOKESPARAMETER EMPTY>
<!ELEMENT EMISSIVITY EMPTY>
<!ELEMENT MODEAPPLITUDE EMPTY>


<!ELEMENT PHOTON_VARIABLE (FREQUENCY | WAVENUMBER | WAVELENGTH | SPECTRAL_RANGE) >

<!ELEMENT FREQUENCY EMPTY>
<!ELEMENT WAVENUMBER EMPTY>
<!ELEMENT WAVELENGTH EMPTY>
<!-- SPECTRAL_RANGE already defined -->

<!ELEMENT PHOTON_QUALIFIER (CIRCULAR | LINEAR | PEAK | AVERAGE | VARIANCE | LINEOFSIGHT | VECTOR 
        | STOKESPARAMETER ) >
        
 <!ELEMENT CIRCULAR EMPTY>
 <!ELEMENT LINEAR EMPTY>
 <!ELEMENT PEAK EMPTY>
 <!ELEMENT AVERAGE EMPTY>
 <!ELEMENT VARIANCE EMPTY>
 <!ELEMENT LINEOFSIGHT EMPTY>
 <!ELEMENT VECTOR EMPTY>



<!--doc: The range of possible values for the
        observed frequency. -->
<!ELEMENT FREQUENCYRANGE (LOW, HIGH?, UNITS, BIN*) >

<!--doc: Information useful in understanding the
        context of an observation, typically
        observed or measured coincidentally with
        a physical observation. -->
<!ELEMENT SUPPORT (OTHER?, POSITIONAL?, TEMPORAL?) >

<!--doc: The specification of the location of an
        object or measurement within a reference
        coordinate system. The position is
        usually expressed as a set of values
        corresponding to the location along a
        set of orthogonal axes together with the
        date/time of the observation. -->
<!ELEMENT POSITIONAL (ORIENTATION+) >

<!--doc: An accessible portion of another
        resource. The ParentID of a Granule
        resource must be a NumericalData
        resource. The attributes of a Granule
        supersede the corresponding attributes
        in the NumericalData resource.  -->
<!ELEMENT GRANULE (RESOURCEID, RELEASEDATE,PARENTID,URL, STARTDATE, STOPDATE) >

<!--doc: A device which is used to sense and
        parameterize a physical phenomenon. -->
<!ELEMENT INSTRUMENT (RESOURCEID, RESOURCEHEADER, INSTRUMENTTYPE,INVESTIGATIONNAME, OBSERVATORYID, CAVEATS) >

<!--doc: The host (spacecraft, network,
        facility) for instruments making
        observations. -->
<!ELEMENT OBSERVATORY (RESOURCEID, RESOURCEHEADER?, OBSERVATORYGROUP?) >

<!--doc: An individual human being. -->
<!ELEMENT PERSON (RESOURCEID, RELEASEDATE?, PERSONNAME?, ORGANIZATIONNAME, ADDRESS?, EMAIL*, PHONENUMBER*) >

<!--doc: A location or facility where resources
        are cataloged. -->
<!ELEMENT REGISTRY (RESOURCEID, RESOURCEHEADER) >

<!--doc: A location or facility where resources
        are stored. --> 
<!ELEMENT REPOSITORY (RESOURCEID, RESOURCEHEADER) >

<!--doc: A location or facility that can perform
        a well defined task. -->
<!ELEMENT SERVICE (RESOURCEID, RESOURCEHEADER, ACCESSURL) >

<!--doc:   DICTIONARY TERMS   -->
<!--doc:                      -->


<!--doc: The individual, group or organization
        which should be acknowledged when the
        data is used in or contributes to a
        presentation or publication. -->
<!ELEMENT ACKNOWLEDGEMENT (#PCDATA) >

<!--doc: Directions for finding some location;
        written on letters or packages that are
        to be delivered to that location. -->
<!ELEMENT ADDRESS (#PCDATA) >

<!--doc: An alternative or shortened name used to
        refer to a resource. This includes
        acronyms, expanded names or synonym for
        a resource. -->
<!ELEMENT ALTERNATENAME (#PCDATA) >

<!--doc:    The resource identifier for a resource
        with which this resource is closely
        associated. -->
<!ELEMENT ASSOCIATIONID (#PCDATA) >

<!--doc: The the number of protons in the nucleus
        of an atom. --> 
<!ELEMENT ATOMICNUMBER (#PCDATA) >

<!--doc:  An indication of the method or service
        which may be used to access the
        resource. -->
<!ELEMENT AVAILABILITY (OFFLINE|ONLINE) >
<!ELEMENT ONLINE  EMPTY>
<!ELEMENT OFFLINE  (MEDIUM+)>
<!ELEMENT MEDIUM (#PCDATA)>

<!--doc: The time interval between the start of
        successive measurements. -->
<!ELEMENT CADENCE (#PCDATA) >

<!--doc:    Information which may be important in
        the avoidance of misuse of the resource.
        This includes things such as instrument -->
<!ELEMENT CAVEATS (#PCDATA) >

<!--doc: The method or form for specifying a
        given point in a given coordinate system -->
<!ELEMENT COORDINATEREPRESENTAION (CARTESIAN| CYLINDRICAL | SPHERICAL) >
<!ELEMENT CARTESIAN EMPTY >
<!ELEMENT CYLINDRICAL EMPTY >
<!ELEMENT SPHERICAL EMPTY >


<!--doc:     Identifies the coordinate system in
        which the position, direction or
        observation has been expressed. -->
<!ELEMENT COORDINATESYSTEMNAME (CGM | DM | GSE | GSEQ  | GSM | GEO | GEI | MAG   | ETI | ETM | SC | 
            RTN | HGC | HAE | HEE | HEEQ | HCI | SR | HG | HGI | J2000 | LGM | MFA | SE | SM | SR2 | SSE )+ >
            
<!ELEMENT GGM EMPTY >
<!ELEMENT DM EMPTY >
<!ELEMENT GSE EMPTY >
<!ELEMENT GSEQ EMPTY >
<!ELEMENT GSM EMPTY >
<!ELEMENT GEO EMPTY >
<!ELEMENT GEI EMPTY >
<!ELEMENT MAG EMPTY >
<!ELEMENT RTN  EMPTY >
<!ELEMENT ETI EMPTY >
<!ELEMENT ETM EMPTY >
<!ELEMENT SC EMPTY >
<!ELEMENT HGC EMPTY >
<!ELEMENT HAE EMPTY >
<!ELEMENT HEE EMPTY >
<!ELEMENT HEEQ EMPTY >
<!ELEMENT HCI EMPTY >
<!ELEMENT SR  EMPTY >
<!ELEMENT HG EMPTY >
<!ELEMENT HGI EMPTY >
<!ELEMENT J2000 EMPTY >
<!ELEMENT LGM EMPTY >
<!ELEMENT MFA EMPTY >
<!ELEMENT SE EMPTY >
<!ELEMENT SM EMPTY >
<!ELEMENT SR2 EMPTY >
<!ELEMENT SSE EMPTY >

<!--doc:    A detailed description of the resource
        which should include discussions of the
        main quantities in the resource,
        possible uses and search terms. A
        description should also include whether
        any corrections (i.e, geometry,
        inertial) have been applied to it.  -->
<!ELEMENT  DESCRIPTION (#PCDATA) >

<!--doc:  The time interval between the successive
        display elements. -->
<!ELEMENT DISPLAYCADENCE (#PCDATA) >

<!--doc:   The electronic address at which the
        individual may be contacted expressed in
        the form &quot;local-part@domain&quot;. -->
<!ELEMENT EMAIL (#PCDATA) >

<!--doc:  A set of unambiguous rules that
        establishes the representation of
        information within a file. -->
<!ELEMENT ENCODING (ASCII | BASE64 | BZIP2 | GZIP | NONE | ZIP | UNICODE )>
<!ELEMENT ASCII EMPTY>
<!ELEMENT BASE64 EMPTY>
<!ELEMENT BZIP2 EMPTY>
<!ELEMENT GZIP EMPTY>
<!ELEMENT NONE EMPTY>
<!ELEMENT ZIP EMPTY>
<!ELEMENT UNICODE EMPTY >

<!--doc:   The specification of a stopping point in
        time. -->
<!ELEMENT ENDDATE (#PCDATA) >

<!--doc: The time interval over which an
        individual measurement is taken. -->
<!ELEMENT EXPOSURE (#PCDATA) >

<!--doc: The organization of data according to preset specifications. The value is selected from a list of accepted names for known, well documented formats. -->
<!ELEMENT FORMAT (CDF |  HDF4 | HDF5 | NETCDF | IDFS |  UDF |  FITS |  CEF |  XML | AVI | BINARY | GIF | HTML | JPEG | MATLAB4 |
                MATLAB_6 | MATLAB_7 | MPEG | NCAR | PDF | PNG | QUICKTIME | TIFF | VOTABLE | 
                 CEF1 | CEF2 | HDF |  TEXT | IDL) >

<!ELEMENT AVI EMPTY>
<!ELEMENT BINARY EMPTY>
<!ELEMENT CDF EMPTY>
<!ELEMENT CEF EMPTY>
<!ELEMENT CEF1 EMPTY>
<!ELEMENT CEF2 EMPTY>
<!ELEMENT FITS EMPTY>
<!ELEMENT GIF EMPTY>
<!ELEMENT HDF EMPTY>
<!ELEMENT HDF4 EMPTY>
<!ELEMENT HDF5 EMPTY>
<!ELEMENT HTML EMPTY>
<!ELEMENT IDFS EMPTY>
<!ELEMENT IDL EMPTY> 
<!ELEMENT JPEG EMPTY>
<!ELEMENT MATLAB_4 EMPTY>
<!ELEMENT MATLAB_6 EMPTY>
<!ELEMENT MATLAB_7 EMPTY>
<!ELEMENT MPEG EMPTY>
<!ELEMENT NCAR EMPTY>
<!ELEMENT NETCDF EMPTY>
<!ELEMENT PDF EMPTY>
<!ELEMENT PNG EMPTY>
<!ELEMENT QUICKTIME EMPTY>
<!ELEMENT TEXT EMPTY>
<!ELEMENT TIFF EMPTY>
<!ELEMENT UDF EMPTY>
<!ELEMENT VOTABLE  EMPTY>
<!ELEMENT XML EMPTY >

<!--doc: The largest value within a range of
        possible values. -->
<!ELEMENT HIGH (#PCDATA) >

<!--doc:   The resource identifier for a resource
        which was used to generate this
        resource. -->
<!ELEMENT INPUTRESOURCEID (#PCDATA) >

<!--doc: The identifier of an Instrument
        resource. -->
<!ELEMENT INSTRUMENTID (#PCDATA) >

<!--doc: The portion of space occupied by the
        instrument at the time of an
        observation. A region is distinguished
        by certain natural features or physical
        characteristics. -->

<!ELEMENT  INSTRUMENT_REGION  (SUN | HELIOSPHERE | EARTH) >

<!ELEMENT SUN ( PHOTOSPHERE | INTERIOR| CHROMOSPHERE | TRANSISTIONREGION | CORONA | EMPTY ) >

<!ELEMENT  INTERIOR EMPTY >
<!ELEMENT  CHROMOSPHERE EMPTY >
<!ELEMENT  TRANSISTIONREGION EMPTY >
<!ELEMENT  CORONA EMPTY  >
<!ELEMENT  PHOTOSPHERE EMPTY >

<!ELEMENT HELIOSPHERE (INNER | OUTER | REMOTE1AU | EMPTY ) >
<!ELEMENT INNER EMPTY>
<!ELEMENT OUTER EMPTY>
<!ELEMENT REMOTE1AU EMPTY>

<!ELEMENT EARTH (MAGNETOSHEATH | MAGNETOSPHERE | NEARSURFACE | SURFACE  | EMPTY ) >
<!ELEMENT MAGNETOSHEATH EMPTY >
<!ELEMENT NEARSURFACE (ATMOSPHERE | AURORALREGION | IONOSPHERE ) >
<!ELEMENT SURFACE (#PCDATA) >
<!ELEMENT ATMOSPHERE EMPTY >
<!ELEMENT AURORALREGION EMPTY >
<!ELEMENT IONOSPHERE EMPTY  >

<!ELEMENT MAGNETOSPHERE (MAIN | MAGNETOTAIL | POLAR | RADIATIONBELT ) >
<!ELEMENT NEAR EMPTY>
<!ELEMENT TAIL EMPTY>
<!ELEMENT POLAR EMPTY>
<!ELEMENT TAILWARD EMPTY>


<!--doc:  A characterization of an integrated
        collection of software and hardware
        containing one or more sensors and
        associated controls used to produce data
        on an environment. -->
<!ELEMENT INSTRUMENTTYPE (ANTENNA | CHANNELTRON | DOUBLESPHERE | ELECTRONDRIFTINSTRUMENT | ELECTROSTATICANALYZER |
                         ENERGETICPARTICLEINSTRUMENT | FARADAYCUP | FLUXFEEDBACK | FOURIERTRANSFORMSPECTROGRAPH |
                         IMAGER | LANGMUIRPROBE | LONGWIRE | MAGNETOMETER | MASSSPECTROMETER | MICROCHANNELPLATE |
                         MONOPOLE | PARTICLECORRELATOR | QUADRISPHERICALANALYSER | RADAR | RESONANCESOUNDER |
                         SEARCHCOIL | SPACECRAFTPOTENTIALCONTROL | SPECTRALPOWERRECIEVER | SPECTROMETER | 
                         WAVEFORMRECIEVER )>
<!ELEMENT ANTENNA EMPTY >
<!ELEMENT CHANNELTRON EMPTY >
<!ELEMENT DOUBLESPHERE EMPTY >
<!ELEMENT ELECTRONDRIFTINSTRUMENT EMPTY >
<!ELEMENT ELECTROSTATICANALYZER EMPTY >
<!ELEMENT ENERGETICPARTILCLEINSTRUMENT EMPTY >
<!ELEMENT FARADAYCUP EMPTY >
<!ELEMENT FLUXFEEDBACK EMPTY >
<!ELEMENT FOURIERTRANSFORMSPECTROGRAPH  EMPTY >
<!ELEMENT IMAGER EMPTY >
<!ELEMENT LANGMUIRPROBE EMPTY >
<!ELEMENT LONGWIRE EMPTY >
<!ELEMENT MAGNETOMETER EMPTY >
<!ELEMENT MASSSPECTROMETER EMPTY >
<!ELEMENT MICROCHANNELPLATE EMPTY >
<!ELEMENT SEARCHCOIL EMPTY >
<!ELEMENT SPACECRAFTPOTENTIALCONTROL EMPTY >
<!ELEMENT SPECTRALPOWERRECEIVER EMPTY >
<!ELEMENT SPECTROMETER  EMPTY >
<!ELEMENT WAVEFORMRECIEVER EMPTY >

<!--doc: The name given to the contract or
        engagement which enabled the data to be
        produced. Each investigation is
        associated with a Principal Investigator
        or Guest Investigator who was
        responsible for the original proposal. 
        For single PI missions each major
        subsystem having its own identified Team
        Leader may also be classed as an
        &quot;Investigation&quot; for the purposes of data
        archiving. --> 
<!ELEMENT INVESTIGATIONNAME (#PCDATA) >

<!--doc: A word or phrase that is relevant to the
        resource but does not exist in other
        documentary information. -->
<!ELEMENT KEYWORD (#PCDATA) >

<!--doc: The smallest value within a range of
        possible values. -->
<!ELEMENT LOW (#PCDATA) >

<!--doc:  A characterization of the quantitative
        assessment of a phenomenon. -->
<!ELEMENT  MEASUREMENTTYPE (MAGNETICFIELD | ELECTRICFIELD | DYNAMICSPECTRA | NEUTRALGAS |
        IONCOMPOSITION | ENERGETICPARTICLES | THERMALPLASMA | NEUTRALATOMIMAGES | RADIOSOUNDINGS |
        IMAGEINTENSITY | RADIANCE | IRRADIANCE | DOPPLERGRAM | MAGNETOGRAM | 
        PROFILE | ACTIVITYINDEX | CHARGEDPARTICLEFLUX | RADIOANDPLASMAWAVES)>

<!ELEMENT MAGNETICFIELD EMPTY> 
<!ELEMENT ELECTRICFIELD EMPTY>
<!ELEMENT DYNAMICSPECTRA EMPTY>
<!ELEMENT NEUTRALGAS EMPTY>
<!ELEMENT IONCOMPOSITION EMPTY>
<!ELEMENT ENERGETICPARTICLES EMPTY>
<!ELEMENT THERMALPLASMA EMPTY>
<!ELEMENT NEUTRALATOMIMAGES EMPTY>
<!ELEMENT RADIOSOUNDINGS EMPTY>
<!ELEMENT IMAGEINTENSITY EMPTY>
<!ELEMENT RADIANCE EMPTY>
<!ELEMENT IRRADIANCE EMPTY>
<!ELEMENT DOPPLERGRAM EMPTY>
<!ELEMENT MAGNETOGRAM EMPTY>
<!ELEMENT PROFILE EMPTY>
<!ELEMENT ACTIVITYINDEX EMPTY>
<!ELEMENT CHARGEDPARTICLEFLUX EMPTY>
<!ELEMENT RADIOANDPLASMAWAVES EMPTY >

<!--doc:  A measured observation which is derived
        from a combination of two or more
        individual measurements. -->
<!ELEMENT MIXED (#PCDATA) >

<!--doc:  A language unit by which a person or
        thing is known. -->
<!ELEMENT NAME (#PCDATA) >

<!--doc:  A set of programmatically related
        observatories. The value is taken from
        an approved list of observatory group
        names.. -->
<!ELEMENT OBSERVATORYGROUP (#PCDATA) >

<!--doc:  The identifier of an Observatory
        resource. -->
<!ELEMENT OBSERVATORYID (#PCDATA) >

<!--doc:   The portion of space measured by the
        instrument at the time of an
        observation. A region is distinguished
        by certain natural features or physical
        characteristics. It is the location of
        the observatory for in situ data, the
        location or region sensed by remote
        sensing observatories and the
        location-of-relevance for parameters
        that are derived from observational
        data. -->
<!ELEMENT OBSERVEDREGION  (SUN | HELIOSPHERE | EARTH )  >

<!--doc:   A unit within a company or other entity
        (e.g., Government agency or branch of
        service) within which many projects are
        managed as a whole.-->
<!ELEMENT ORGANIZATIOINNAME (#PCDATA) >

<!--doc:   The direction within a coordinate
        system.-->
<!ELEMENT ORIENTATION (H | PHI | R | THETA | X | Y | Z ) >
<!ELEMENT H EMPTY >
<!ELEMENT PHI EMPTY >
<!ELEMENT R EMPTY >
<!ELEMENT THETA EMPTY >
<!ELEMENT X EMPTY >
<!ELEMENT Y EMPTY >
<!ELEMENT Z EMPTY >


<!--doc:   Values, such as flags, that are not time
        tags, location data or measured or
        derived parameters.-->
<!ELEMENT OTHER (#PCDATA) >

<!--doc:   The name or identfier which can be used
        to access the parameter in the resource.
        The associated value is dependent on the
        service used to access the resource.-->
<!ELEMENT PARAMETERKEY (#PCDATA) >

<!--doc:   The resource identifier for a resource
        that a resource is a part of. The
        resource inherits the attributes of the
        referenced resource. Attributes defined
        in the resource override attributes of
        the parent in the manner perscribed by
        the containing resource.-->
<!ELEMENT PARENTID (#PCDATA) >

<!--doc:   Characterizes the directional and
        statistical aspects of the particle
        observation.-->
<!ELEMENT PARTICLEQUALIFIER (AVERAGE | COMPONENT | DEVIATION | DIFFERENTIAL | FIT | INTEGRAL |    
                                MAGNITUDE | MOMENT | PARALLEL | PEAK | PERPENDICULAR | RATIO |
                                VARIANCE | VECTOR ) >
<!ELEMENT  DIFFERENTIAL EMPTY>
<!ELEMENT  FIT EMPTY>
<!ELEMENT  INTEGRAL EMPTY>
<!ELEMENT  MOMENT EMPTY>
<!ELEMENT  PARALLEL EMPTY>
<!ELEMENT  RATIO EMPTY>


<!--doc:   A characterization of the physical
        properties of the particle.-->
<!ELEMENT PARTICLEQUANTITY ( ALFVENMACHNUMBER | AVERAGECHARGESTATE | COUNTS | FLUX | HEATFLUX | MASS |
                             MASSDENSITY | NUMBERDENSITY | PHASESPACEDENSITY | PLASMABETA | PRESSURE |
                             SONICMACHNUMBER | TEMPERATURE | THERMALSPEED | VELOCITY ) >
<!ELEMENT  ALFVENMACHNUMBER EMPTY>
<!ELEMENT  AVERAGECHARGESTATE EMPTY>
<!ELEMENT  COUNTS EMPTY>
<!ELEMENT  HEATFLUX EMPTY>
<!ELEMENT  MASS EMPTY>
<!ELEMENT  MASSDENSITY EMPTY>
<!ELEMENT  NUMBERDENSITY EMPTY>
<!ELEMENT  PHASESPACEDENSITY EMPTY>
<!ELEMENT  PLASMABETA EMPTY>
<!ELEMENT  PRESSURE EMPTY>
<!ELEMENT  SONICMACHNUMBER EMPTY>
<!ELEMENT  TEMPERATURE EMPTY>
<!ELEMENT  THREMALSPEED EMPTY>

<!--doc:   A characterization of the kind of
        particle observed by the measurement.-->
<!ELEMENT PARTICLETYPE ( AEROSOL | ALPHAPARTICLE | DUST | ELECTRON | ION | MOLECULE | NEUTRAL | PHOTON ) >
<!ELEMENT  AEROSOL EMPTY>
<!ELEMENT  ALPHAPARTICLE EMPTY>
<!ELEMENT  DUST EMPTY>
<!ELEMENT  ELECTRON EMPTY>
<!ELEMENT  ION EMPTY>
<!ELEMENT  MOLECULE EMPTY>
<!ELEMENT  NEUTRAL EMPTY>

<!--doc:     The identifier assigned to a Person
        description.-->
<!ELEMENT PERSONID (#PCDATA) >

<!--doc:   The words used to address an individual.-->
<!ELEMENT PERSONNAME (#PCDATA) >

<!--doc:   The characteristics or categorization of
        an event type..-->
<!ELEMENT  PHENOMENONTYPE ( AURORA | BOWSHOCKCROSSING | CORONALMASSEJECTION | ENERGETICSOLARPARTICLEEVENT |
                             FORBUSHDECREASE | GEOMAGNETICSTORM | INTERPLANETARYSHOCK | MAGNETOPAUSECROSSING |
                             SOLARFLARE | SOLARWINDEXTREME | STATISTICS ) >
<!ELEMENT  BOWSHOCKCROSSING EMPTY>
<!ELEMENT  CORONALMASSEJECTION EMPTY>
<!ELEMENT  ENERGETICSOLARPARTICLEEVENT EMPTY>
<!ELEMENT  FORBUSHDECREASE EMPTY>
<!ELEMENT  GEOMAGNETICSTORM EMPTY>
<!ELEMENT  INTERPLANETARYSHOCK EMPTY>
<!ELEMENT  MAGNETOPAUSECROSSING EMPTY>
<!ELEMENT  SOLARFLARE EMPTY>
<!ELEMENT  SOLARWINDEXTREME EMPTY>
<!ELEMENT  STATISTICS EMPTY>

<!--doc:   The symbols and numerals required to
        contact an individual by telephone. The
        string may contain punctuation marks
        such as dash (-) or dot (.) to separate
        fields within the string.-->
<!ELEMENT PHONENUMBER (#PCDATA) >

<!--doc:    Characterizes the directional and
        statistical aspects of the photon
        observation.-->
<!ELEMENT  PHOTONQUALIFIER ( AVERAGE | CIRCULAR | LINEOFSIGHT | LINEAR | PEAK | STOKESPARAMETER | VARIANCE | VECTOR ) >


<!--doc:    A characterization of the physical
        properties of the photon.-->
<!ELEMENT  PHOTONQUANTITIY ( EMISSIVITY | EQUIVALENTWIDTH | FLUX | INTENSITY | LINEDEPTH | MAGNETICFIELD | MODEAMPLITUDE | 
                             POLARIZATION | STOKESPARAMETERS | VELOCITY ) >

<!ELEMENT  MODEAMPLITUDE EMPTY>

<!--doc:   The provider specific classification of
        the processing performed on the product.-->
<!ELEMENT PROVIDERPROCESSINGLEVEL ( CALIBRATED | RAW | UNCALIBRATED ) >
<!ELEMENT  CALIBRATED EMPTY>
<!ELEMENT  RAW EMPTY>
<!ELEMENT  UNCALIBRATED EMPTY>

<!--doc:   A short textual description of a
        resource used by the provider which may
        be used to identify a resource.-->
<!ELEMENT PROVIDERRESOURCENAME (#PCDATA) >

<!--doc:   Describes the release or edition of the
        product used by the provider. The
        formation rule may vary between
        providers. It is intended to aid in
        queries to the provider regarding the
        product.-->
<!ELEMENT PROVIDERVERSION (#PCDATA) >

<!--doc:   An indication of the nominal end date
        relative to the present.-->
<!ELEMENT RELATIVEENDDATE (#PCDATA) >

<!--doc:   The point in time when an item is made
        available. -->
<!ELEMENT RELEASEDATE (#PCDATA) >

<!--doc:   ID of data storage location -->
<!ELEMENT REPOSITORYID (#PCDATA) >

<!--doc:   A Resource ID is a URI that has the form
        &quot;scheme://authority/path&quot; where &quot;scheme&quot;
        is &quot;spase&quot; for those resources
        administered through the SPASE
        framework, &quot;authority&quot; is the unique
        identifier for the resource provider
        registered within the SPASE framework
        and &quot;path&quot; is the unique identifier of
        the resource within the context of the
        &quot;authority&quot;. The resource ID must be
        unique within the SPASE framework.-->
<!ELEMENT RESOURCEID (#PCDATA) >

<!--doc:   A short textual description of a
        resource which may be useful when read
        by a person. -->
<!ELEMENT RESOURCENAME (#PCDATA) >

<!--doc: The assigned or assumed function or
        position of an individual. -->
<!ELEMENT ROLE (COINVESGITATOR | DATAPRODUCER | GENERALCONTACT | PRINCIPLEINVESTIGATOR | PROJECTSCIENTIST |
                 SCIENTIST | TEAMLEADER | TEAMMEMBER | TECHNICALCONTACT ) >
<!ELEMENT  COINVESGITATOR EMPTY>
<!ELEMENT  DATAPRODUCER EMPTY>
<!ELEMENT  GENERALCONTACT EMPTY>
<!ELEMENT  PRINCIPLEINVESTIGATOR EMPTY>
<!ELEMENT  PROJECTSCIENTIST EMPTY>
<!ELEMENT  SCIENTIST EMPTY>
<!ELEMENT  TEAMLEADER EMPTY>
<!ELEMENT  TEAMMEMBER EMPTY>
<!ELEMENT  TECHNICALCONTACT EMPTY>

<!--doc:   The physical dimensions, proportions,
        magnitude, or extent of an object..-->
<!ELEMENT SIZE (#PCDATA) >

<!--doc: The general term used to describe
        wavelengths or frequencies within a
        given span of values for those
        quantities. -->
<!ELEMENT SPECTRALRANGE ( GAMMARAYS | HARDXRAYS | INFRARED | MICROWAVE | OPTICAL | RADIOFREQUENCY | ULTRAVIOLET | XRAYS ) >
<!ELEMENT  GAMMARAYS EMPTY>
<!ELEMENT  HARDXRAYS EMPTY>
<!ELEMENT  INFRARED EMPTY>
<!ELEMENT  MICROWAVE EMPTY>
<!ELEMENT  OPTICAL EMPTY>
<!ELEMENT  RADIOFREQUENCY EMPTY>
<!ELEMENT  ULTRAVIOLET EMPTY>
<!ELEMENT  XRAYS EMPTY>

<!--doc:   The specification of a starting point in
        time.-->
<!ELEMENT STARTDATE (#PCDATA) >

<!--doc:   The specification of a end point in
        time.-->
<!ELEMENT STOPDATE (#PCDATA) >

<!--doc:   Pertaining to time.-->
<!ELEMENT TEMPORAL (#PCDATA) >

<!--doc:    Uniform Resource Locator (URL) is the
        global address of documents and other
        resources on the World Wide Web. The
        first part of the address indicates what
        protocol to use, and the second part
        specifies the IP address or the domain
        name where the resource is located
        followed by the pathname of the
        resource. A URL is specified in the form
        protocol://server.domain.name:port/pathname.
        Example protocols are HTTP or FTP,
        server domain name is the Internet name.-->
<!ELEMENT URL (#PCDATA) >

<!--doc:   A description of the standardized
        measurement increments in which a value
        is specified. The description is
        represented as a mathematical phrase.
        Individual units within the phrase must
        conform to the International System of
        Units (SI) which is maintained by BIPM
        (Bureau International des Poids et
        Mesures. See &lt;http://www.bipm.fr/&gt; ).
        The symbol associated with a unit should
        be used in the phrase. Within the phrase
        the circumflex (^) is used to indicate a
        power, a star (*) is used to indicate
        multiplication and a slash (/) division.
        When symbols are not separated by a
        mathematical operator, multiplication is
        assumed. Symbols for base units can be
        found at:
        &lt;http://www.bipm.fr/en/si/si_brochure/chapter2/2-1/#symbols&gt;
        and those for common derived units can
        be found at:
        &lt;http://www.bipm.fr/en/si/derived_units/2-2-2.html&gt;.-->
<!ELEMENT UNITS (#PCDATA) >

<!--doc:   The multiplicative factor for converting
        a unit into International System of
        Units (SI) units. The factor is
        expressed in the form &quot;number &gt; x&quot;,
        where &quot;number&quot; is a numerical value and
        &quot;x&quot; is the appropriate SI units. The
        basic SI units are Enumerated: m
        (meter), N (newton), kg (kilogram), Pa
        (pascal), s (second), Hz (hertz), A
        (ampere), V (volt), K (kelvin), W
        (watt), rad (radian), J (joule), sr
        (steradian), C (coulomb), T (tesla), ohm
        (ohm), mho (mho or seimens), H (henry),
        and F (farad). Two useful units which
        are not SI units are: degree (angle),
        and unitless (no units). An example is:
        &quot;1.0E-5&gt;T&quot; which converts the units,
        presumable nT, to tesla. Another example
        is: &quot;1.0e-1&gt;km/s&quot; which converts a
        velocity expressed in meters per second
        to kilometers per second.-->
<!ELEMENT UNITSCONVERSION (#PCDATA) >

<!--doc:   Indicates the release identifier. When
        used to indicate the release of the
        SPASE data model, it is a in the form
        Major.Minor.Fix where Major: A
        significant change in the architecture
        of the model or rewrite of the
        implementation. This includes major
        changes in design or implementation
        language. This number starts at 0
        (zero). Minor: An addition of terms or
        features that require changes in
        documentation/external API. This number
        starts at 0 (zero). Fix: Any change that
        doesn't require documentation/external
        API changes. This number starts at 0
        (zero).-->
<!ELEMENT VERSION (#PCDATA) >



 