Comparison with StationXML

obsinfo information fields are as close to StationXML as feasible, but the need to reduce duplicated information requires some changes.

Summmary of differences

YAML_ instead of XML

Files are easier to read (as long as they are kept small) and we can take advantage of the JSONref_ standard for importing files

arrays instead of multiply-used fields:

XML allows the same field name to be used repeatedly, YAML_ does not. So multiply-used fields in StationXML are replaced with arrays, usually with an “s” tacked onto the field name. Some examples (noted as they are in the following tables) are:

StationXML field	obsinfo array
Comment: (0+)	comments: []
CalibrationDate: (0+)	calibration_dates: []

Use of $ref s to insert other files

Inherited from JSONref_ and is the key to reducing information to atomic components

Use of base channels and specific modifiers

Many channels have much the same information (position, start and enddates, even sensors). obsinfo therefore allows a base channel definition, which is then modified by values placed in the specfic modifiers fields

Default inheritance of some fields

In many cases, the operator, location_code, start_date and end_date values are the same at the network, station and channel levels. In StationXML they must be redefined in each level. In obsinfo, if they are not defined at a level, they are inherited from the level above.

No sensitivity stage in obsinfo

The StationXML sensitivity stage is supposed to correspond to the sum of the sensitivities of the underlying stages. obsinfo therefore simply calculates this value from the provided stages

Handling of InstrumentComponents

StationXML Channel/Datalogger, Channel/Sensor and Channel/Preamplifier elements are actually Equipment objects. These elements’ response stages are mixed into the Channel/Stages list.

obsinfo_ datalogger, sensor and (optional) preamplifier elements contain equipment definitions, response_stage lists and elements specific to each InstrumentComponent (sensor : seed_code, azimuth, dip. datalogger: sampling_rate) which are given flatly in the StationXML Channel level

The StationXML InstrumentSensitivity stage should equal the sum of the sensitivities of the underlying stages at the given frequency. obsinfo_ therefore does not ask for this value, but calculates it from the provided stages

Handling of positions

StationXML 1.2 specifies Station and Channel positions using the elements Latitude, Longitude and Elevation, each of which is based on the FloatType_ which includes units, plusError, minusError and measurementMethod

Latitudes and Longitudes are generally given in degrees and Elevation in meters, but most most OBS (and land station) positions have an uncertainty that is approximately constant (in meters), depending on the measurementMethod.

For this reason, obsinfo_ expresses positions and their uncertainties using three elements: - position: {lat:, lon:, elev.m:} - positition_uncertainty: {lat.m, lon.m, elev.m} - position_measurement_method: string

This allows the position_uncertainty values to be associated with a measurement method and entered separately from the actual instrument position. obsinfo_ then translates these values into StationXML FloatTypes with the appropriate units arc-degrees, arc-degrees and meters), with the arc-degrees value depending on the station latitude.

Line-by-line comparison of differences

Below is a line by line naming of StationXML 1.2 fields and their equivalent name in obsinfo information files:

StationXML FDSNStationXML	obsinfo
Source	None
Sender	None
Module	None
ModuleURI	None
Created	Automatically calculated
Network	See Network_ level

StationXML Network	obsinfo network
code (attribute)	code
startDate (attribute)	start_date:
endDate (attribute)	end_date:
sourceID (attribute)	source_id
restrictedStatus (attribute)	restricted_status
Description	description
Comment (0+)	comments
Operator	operator
Identifier	identifiers
SelectedNumberStations	number of stations specified
Station (0+)	stations *see station_ *
*DataAvailability	None
alternateCode (attribute)	None
historicalCode (attribute)	None

StationXML Equipment	obsinfo equipment
Description	description
Type	type
Manufacturer	manufacturer
Model	model
Vendor	vendor
SerialNumber	serial_number
InstallationDate	installation_date
RemovalDate	removal_date
resourceId	resource_id
CalibrationDate: (0+)	calibration_dates: []

The StationXML Response level is replaced in obsinfo_ by the datalogger preamplifier and sensor levels

StationXML Response	obsinfo channel	Notes
resourceId (attribute)
InstrumentSensitivity	calculated from Stages
InstrumentPolynomial	None	StationXML allows either InstrumentSensitivity or InstrumentPolynomial
Stage (0+)	datalogger_ preamplifier_ sensor_

StationXML Stage	obsinfo stage	Notes
number (attribute)	calculated by obsinfo
resourceId (attribute)
{Type}	filter/type:	Can be PolesZeros, Coefficients, ResponseList, FIR or Polynomial
Decimation		DecimationType_, Not in “Polynomials”
StageGain		GainType: Value, Frequency. Not in “Polynomials”

StationXML DecimationType	obsinfo stage	Notes
InputSampleRate
Factor
Offset
Delay
Correction

StationXML PolesZeros	obsinfo filter	Notes
name (attribute)
resourceId (attribute)
Description
InputUnits
OutputUnits
PzTransferFunctionType
NormalizationFactor
NormalizationFrequency
Zero: (0+)
Pole: (0+)

StationXML Coefficients	obsinfo filter	Notes
name (attribute)
resourceId (attribute)
Description
InputUnits
OutputUnits
CfTransferFunctionType
Numerator: (0+)
Denominator: (0+)

StationXML ResponseList	obsinfo filter	Notes
name (attribute)
resourceId (attribute)
Description
InputUnits
OutputUnits
ResponseListElement: (0+)		StationXML: Frequency, Amplitude, Phase

StationXML FIR	obsinfo filter	Notes
name (attribute)
resourceId (attribute)
Description
InputUnits
OutputUnits
Symmetry		NONE, EVEN or ODD
NumeratorCoefficient: (0+)

StationXML Polynomial	obsinfo filter	Notes
name (attribute)
resourceId (attribute)
Description
InputUnits
OutputUnits
ApproximationType		default=”MACLAURIN”>
FrequencyLowerBound
FrequencyUpperBound
ApproximationLowerBound
ApproximationUpperBound
MaximumError
Coefficient: (0+)

StationXML Operator	obsinfo operator
Agency: string	agency: string
Contact: []	contacts: []
WebSite: URI	website: uri

StationXML PersonType	obsinfo person
Name: (0+)	name:
Agency: (0+)	agencies: []
Email: (0+)	emails: []
Phone: (0+)	phones: [PhoneNumberType_]

StationXML PhoneNumberType	obsinfo
CountryCode
AreaCode
PhoneNumber
name

StationXML uncertaintyDouble	obsinfo
plusError (attribute)	uncertainty: float
minusError (attribute)
measurementMethod (attribute)	measurement_method: string

FDSNStationXML:
  Network:
      Station:
          Channel:
            - *Description: string*
              *Identifier:*
                - string
              *Comment:*
                - Value: string
                  BeginEffectiveTime: '2017-08-25T05:02:50.47'
                  EndEffectiveTime: '2016-03-07T01:49:19.16'
                  Author: ''
                    - ''
                - Value: string
              *DataAvailability:*
                Extent: ''
                Span:
                  - ''
              ExternalReference:
                URI: <URI>
                Description: string
              Latitude: number
              Longitude: number
              Elevation: number
              Depth: number
              *Azimuth: number*
              Dip: number
              Type:
                - [CONTINUOUS, HEALTH, SYNTHESIZED, GEOPHYSICAL, TRIGGERED, or WEATHER]
              SampleRate: number
              SampleRateRatio:
                NumberSamples: number
                NumberSeconds: number
              ClockDrift: number
              *CalibrationUnits:*
                Name: string
                Description: string
              Sensor:
                <equipment>
              *PreAmplifier:*
                <equipment>
              DataLogger:
                <equipment>
              Equipment:
                <equipment>
              Response:
                AnyElementYouLike: Some Data Or Other Elements
            - Identifier: string
    - ''
    - ''

<DecimationType
    InputSampleRate
    Factor
    Offset
    Delay
    Correction

   <BaseNodeType>
       code *(attribute)*
       *startDate *(attribute)*
       *endDate* *(attribute)*
       *sourceID* *(attribute)*
       *restrictedStatus* *(attribute)*
       *alternateCode* *(attribute)*
       *historicalCode* *(attribute)*
       *Description:*
       *Identifier (0+)*
       *Comment (0+)*
       *DataAvailability*

.. code-block:: yaml

   <BaseFilterType>
       name (attribute)
       resourceId (*attribute*)
       *Description*
       InputUnits
       OutputUnits

# stationxml 1.2 schema, with <annotations> and their contained <documentation>s removed

    <xs:element name="FDSNStationXML" type="fsx:RootType"/>
    <xs:complexType name="RootType">
            <xs:sequence>
                    <xs:element name="Source" type="xs:string">
                    <xs:element name="Sender" type="xs:string" minOccurs="0">
                    <xs:element name="Module" type="xs:string" minOccurs="0">
                    <xs:element name="ModuleURI" type="xs:anyURI" minOccurs="0">
                    <xs:element name="Created" type="xs:dateTime">
                    <xs:element name="Network" type="fsx:NetworkType" maxOccurs="unbounded"/>
                    <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="schemaVersion" type="xs:decimal" use="required">
            <xs:anyAttribute namespace="##other" processContents="lax"/>
    </xs:complexType>
    <xs:complexType name="NetworkType">
            <xs:complexContent>
                    <xs:extension base="fsx:BaseNodeType">
                            <xs:sequence>
                                    <xs:element name="Operator" type="fsx:OperatorType" minOccurs="0"
                                            maxOccurs="unbounded">
                                    <xs:element name="TotalNumberStations" type="fsx:CounterType" minOccurs="0">
                                    <xs:element name="SelectedNumberStations" type="fsx:CounterType" minOccurs="0">
                                    <xs:element name="Station" type="fsx:StationType" minOccurs="0"
                                            maxOccurs="unbounded"/>
                            </xs:sequence>
                    </xs:extension>
            </xs:complexContent>
    </xs:complexType>
<xs:complexType name="StationType">
    <xs:complexContent>
        <xs:extension base="fsx:BaseNodeType">
            <xs:sequence>
                <xs:element name="Latitude" type="fsx:LatitudeType">
                <xs:element name="Longitude" type="fsx:LongitudeType">
                <xs:element name="Elevation" type="fsx:DistanceType">
                <xs:element name="Site" type="fsx:SiteType">
                <xs:element name="WaterLevel" type="fsx:FloatType" minOccurs="0">
                <xs:element name="Vault" type="xs:string" minOccurs="0">
                <xs:element name="Geology" type="xs:string" minOccurs="0">
                <xs:element name="Equipment" type="fsx:EquipmentType" minOccurs="0"
                    maxOccurs="unbounded">
                </xs:element>
                <xs:element name="Operator" type="fsx:OperatorType" minOccurs="0"
                    maxOccurs="unbounded">
                </xs:element>
                <xs:element name="CreationDate" type="xs:dateTime" minOccurs="0">
                <xs:element name="TerminationDate" type="xs:dateTime" minOccurs="0">
                <xs:element name="TotalNumberChannels" type="fsx:CounterType" minOccurs="0">
                <xs:element name="SelectedNumberChannels" type="fsx:CounterType" minOccurs="0">
                <xs:element name="ExternalReference" type="fsx:ExternalReferenceType"
                    minOccurs="0" maxOccurs="unbounded">
                <xs:element name="Channel" type="fsx:ChannelType" minOccurs="0"
                    maxOccurs="unbounded"/>
            </xs:sequence>
        </xs:extension>
    </xs:complexContent>
</xs:complexType>
<!-- End StationType-->
<xs:complexType name="ChannelType">
    <xs:complexContent>
        <xs:extension base="fsx:BaseNodeType">
            <xs:sequence>
                <xs:element name="ExternalReference" type="fsx:ExternalReferenceType"
                    minOccurs="0" maxOccurs="unbounded">
                </xs:element>
                <xs:element name="Latitude" type="fsx:LatitudeType">
                <xs:element name="Longitude" type="fsx:LongitudeType">
                <xs:element name="Elevation" type="fsx:DistanceType">
                <xs:element name="Depth" type="fsx:DistanceType">
                <xs:element name="Azimuth" type="fsx:AzimuthType" minOccurs="0">
                <xs:element name="Dip" type="fsx:DipType" minOccurs="0">
                <xs:element name="WaterLevel" type="fsx:FloatType" minOccurs="0">
                <xs:element name="Type" minOccurs="0" maxOccurs="unbounded">
                    <xs:simpleType>
                        <xs:restriction base="xs:NMTOKEN">
                            <xs:enumeration value="TRIGGERED"/>
                            <xs:enumeration value="CONTINUOUS"/>
                            <xs:enumeration value="HEALTH"/>
                            <xs:enumeration value="GEOPHYSICAL"/>
                            <xs:enumeration value="WEATHER"/>
                            <xs:enumeration value="FLAG"/>
                            <xs:enumeration value="SYNTHESIZED"/>
                            <xs:enumeration value="INPUT"/>
                            <xs:enumeration value="EXPERIMENTAL"/>
                            <xs:enumeration value="MAINTENANCE"/>
                            <xs:enumeration value="BEAM"/>
                        </xs:restriction>
                    </xs:simpleType>
                </xs:element>
                <xs:group ref="fsx:SampleRateGroup" minOccurs="0"/>
                <xs:element name="ClockDrift" minOccurs="0">
                    <xs:complexType>
                        <xs:simpleContent>
                            <xs:restriction base="fsx:FloatType">
                                <xs:minInclusive value="0"/>
                                <xs:attribute name="unit" type="xs:string" use="optional" fixed="SECONDS/SAMPLE">
                                    </xs:attribute>
                            </xs:restriction>
                        </xs:simpleContent>
                    </xs:complexType>
                </xs:element>
                <xs:element name="CalibrationUnits" type="fsx:UnitsType" minOccurs="0">
                <xs:element name="Sensor" type="fsx:EquipmentType" minOccurs="0">
                <xs:element name="PreAmplifier" type="fsx:EquipmentType" minOccurs="0">
                <xs:element name="DataLogger" type="fsx:EquipmentType" minOccurs="0">
                <xs:element name="Equipment" type="fsx:EquipmentType" minOccurs="0" maxOccurs="unbounded">
                <xs:element name="Response" type="fsx:ResponseType" minOccurs="0"/>
            </xs:sequence>
            <xs:attribute name="locationCode" type="xs:string" use="required">
        </xs:extension>
    </xs:complexContent>
</xs:complexType>
<!-- End ChannelType -->
<xs:complexType name="GainType">
    <xs:sequence>
        <xs:element name="Value" type="xs:double">
        <xs:element name="Frequency" type="xs:double">
    </xs:sequence>
</xs:complexType>
<xs:group name="FrequencyRangeGroup">
    <xs:sequence>
        <xs:element name="FrequencyStart" type="xs:double">
        <xs:element name="FrequencyEnd" type="xs:double">
        <xs:element name="FrequencyDBVariation" type="xs:double">
    </xs:sequence>
</xs:group>
<xs:complexType name="SensitivityType">
    <xs:complexContent>
        <xs:extension base="fsx:GainType">
            <xs:sequence>
                <xs:element name="InputUnits" type="fsx:UnitsType">
                <xs:element name="OutputUnits" type="fsx:UnitsType">
                <xs:group ref="fsx:FrequencyRangeGroup" minOccurs="0">
            </xs:sequence>
        </xs:extension>
    </xs:complexContent>
</xs:complexType>
<xs:complexType name="EquipmentType">
    <xs:sequence>
        <xs:element name="Type" type="xs:string" minOccurs="0">
        <xs:element name="Description" type="xs:string" minOccurs="0">
        <xs:element name="Manufacturer" type="xs:string" minOccurs="0">
        <xs:element name="Vendor" type="xs:string" minOccurs="0">
        <xs:element name="Model" type="xs:string" minOccurs="0">
        <xs:element name="SerialNumber" type="xs:string" minOccurs="0">
        <xs:element name="InstallationDate" type="xs:dateTime" minOccurs="0">
        <xs:element name="RemovalDate" type="xs:dateTime" minOccurs="0">
        <xs:element name="CalibrationDate" type="xs:dateTime" minOccurs="0" maxOccurs="unbounded">
        <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="resourceId" type="xs:string" use="optional">
    </xs:attribute>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
</xs:complexType>
<xs:complexType name="ResponseStageType">
    <xs:sequence>
        <xs:choice>
            <xs:sequence>
                <xs:choice>
                    <xs:element name="PolesZeros" type="fsx:PolesZerosType" minOccurs="0">
                    <xs:element name="Coefficients" type="fsx:CoefficientsType" minOccurs="0"/>
                    <xs:element name="ResponseList" type="fsx:ResponseListType" minOccurs="0"/>
                    <xs:element name="FIR" type="fsx:FIRType" minOccurs="0">
                </xs:choice>
                <xs:element name="Decimation" type="fsx:DecimationType" minOccurs="0"/>
                <xs:element name="StageGain" type="fsx:GainType">
            </xs:sequence>
            <xs:element name="Polynomial" type="fsx:PolynomialType">
        </xs:choice>
        <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="number" type="fsx:CounterType" use="required">
    <xs:attribute name="resourceId" type="xs:string">
    <xs:anyAttribute namespace="##other" processContents="lax"/>
</xs:complexType>
<xs:complexType name="CommentType">
    <xs:sequence>
        <xs:element name="Value" type="xs:string">
        <xs:element name="BeginEffectiveTime" type="xs:dateTime" minOccurs="0">
        <xs:element name="EndEffectiveTime" type="xs:dateTime" minOccurs="0">
        <xs:element name="Author" type="fsx:PersonType" minOccurs="0" maxOccurs="unbounded">
    </xs:sequence>
    <xs:attribute name="id" type="fsx:CounterType" use="optional">
    <xs:attribute name="subject" type="xs:string" use="optional">
</xs:complexType>
<xs:complexType name="PolesZerosType">
    <xs:complexContent>
        <xs:extension base="fsx:BaseFilterType">
            <xs:sequence>
                <xs:element name="PzTransferFunctionType">
                    <xs:simpleType>
                        <xs:restriction base="xs:string">
                            <xs:enumeration value="LAPLACE (RADIANS/SECOND)"/>
                            <xs:enumeration value="LAPLACE (HERTZ)"/>
                            <xs:enumeration value="DIGITAL (Z-TRANSFORM)"/>
                        </xs:restriction>
                    </xs:simpleType>
                </xs:element>
                <xs:element name="NormalizationFactor" type="xs:double" default="1.0">
                <xs:element name="NormalizationFrequency" type="fsx:FrequencyType">
                <xs:element name="Zero" type="fsx:PoleZeroType" minOccurs="0" maxOccurs="unbounded">
                <xs:element name="Pole" type="fsx:PoleZeroType" minOccurs="0" maxOccurs="unbounded">
            </xs:sequence>
        </xs:extension>
    </xs:complexContent>
</xs:complexType>
<xs:complexType name="FIRType">
    <xs:complexContent>
        <xs:extension base="fsx:BaseFilterType">
            <xs:sequence>
                <xs:element name="Symmetry">
                    <xs:simpleType>
                        <xs:restriction base="xs:NMTOKEN">
                            <xs:enumeration value="NONE"/>
                            <xs:enumeration value="EVEN"/>
                            <xs:enumeration value="ODD"/>
                        </xs:restriction>
                    </xs:simpleType>
                </xs:element>
                <xs:element name="NumeratorCoefficient" minOccurs="0" maxOccurs="unbounded">
                    <xs:complexType>
                        <xs:simpleContent>
                            <xs:extension base="xs:double">
                                <xs:attribute name="i" type="xs:integer"/>
                            </xs:extension>
                        </xs:simpleContent>
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:extension>
    </xs:complexContent>
</xs:complexType>
<xs:complexType name="CoefficientsType">
    <xs:complexContent>
        <xs:extension base="fsx:BaseFilterType">
            <xs:sequence>
                <xs:element name="CfTransferFunctionType">
                    <xs:simpleType>
                        <xs:restriction base="xs:string">
                            <xs:enumeration value="ANALOG (RADIANS/SECOND)"/>
                            <xs:enumeration value="ANALOG (HERTZ)"/>
                            <xs:enumeration value="DIGITAL"/>
                        </xs:restriction>
                    </xs:simpleType>
                </xs:element>
                <xs:element name="Numerator" minOccurs="0" maxOccurs="unbounded">
                    <xs:complexType>
                        <xs:simpleContent>
                            <xs:extension base="fsx:FloatNoUnitType">
                                <xs:attribute name="number" type="fsx:CounterType"/>
                            </xs:extension>
                        </xs:simpleContent>
                    </xs:complexType>
                </xs:element>
                <xs:element name="Denominator" minOccurs="0" maxOccurs="unbounded">
                    <xs:complexType>
                        <xs:simpleContent>
                            <xs:extension base="fsx:FloatNoUnitType">
                                <xs:attribute name="number" type="fsx:CounterType"/>
                            </xs:extension>
                        </xs:simpleContent>
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:extension>
    </xs:complexContent>
</xs:complexType>
<xs:complexType name="ResponseListElementType">
    <xs:sequence>
        <xs:element name="Frequency" type="fsx:FrequencyType"/>
        <xs:element name="Amplitude" type="fsx:FloatType"/>
        <xs:element name="Phase" type="fsx:AngleType"/>
    </xs:sequence>
</xs:complexType>
<xs:complexType name="ResponseListType">
    <xs:complexContent>
        <xs:extension base="fsx:BaseFilterType">
            <xs:sequence>
                <xs:element name="ResponseListElement" type="fsx:ResponseListElementType"
                    minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
        </xs:extension>
    </xs:complexContent>
</xs:complexType>
<xs:complexType name="PolynomialType">
    <xs:complexContent>
        <xs:extension base="fsx:BaseFilterType">
            <xs:sequence>
                <xs:element name="ApproximationType" default="MACLAURIN">
                    <xs:simpleType>
                        <xs:restriction base="xs:string">
                            <xs:enumeration value="MACLAURIN"/>
                        </xs:restriction>
                    </xs:simpleType>
                </xs:element>
                <xs:element name="FrequencyLowerBound" type="fsx:FrequencyType">
                <xs:element name="FrequencyUpperBound" type="fsx:FrequencyType">
                <xs:element name="ApproximationLowerBound" type="xs:double">
                <xs:element name="ApproximationUpperBound" type="xs:double">
                <xs:element name="MaximumError" type="xs:double">
                <xs:element name="Coefficient" maxOccurs="unbounded">
                    <xs:complexType>
                        <xs:simpleContent>
                            <xs:extension base="fsx:FloatNoUnitType">
                                <xs:attribute name="number" type="fsx:CounterType"/>
                            </xs:extension>
                        </xs:simpleContent>
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:extension>
    </xs:complexContent>
</xs:complexType>
<xs:complexType name="DecimationType">
    <xs:sequence>
        <xs:element name="InputSampleRate" type="fsx:FrequencyType"/>
        <xs:element name="Factor" type="xs:integer">
        <xs:element name="Offset" type="xs:integer">
        <xs:element name="Delay" type="fsx:FloatType">
        <xs:element name="Correction" type="fsx:FloatType">
    </xs:sequence>
</xs:complexType>
<!-- The following elements represent numbers. -->
<xs:attributeGroup name="uncertaintyDouble">
    <xs:attribute name="plusError" type="xs:double" use="optional">
    <xs:attribute name="minusError" type="xs:double" use="optional">
    <xs:attribute name="measurementMethod" type="xs:string" use="optional"/>
</xs:attributeGroup>
<xs:complexType name="FloatNoUnitType">
    <xs:simpleContent>
        <xs:extension base="xs:double">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="FloatType">
    <xs:simpleContent>
        <xs:extension base="xs:double">
            <xs:attribute name="unit" type="xs:string" use="optional">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>
<!-- Derived from FloatType. -->
<xs:complexType name="SecondType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:attribute name="unit" type="xs:string" fixed="SECONDS">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="VoltageType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:attribute name="unit" type="xs:string" fixed="VOLTS">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="AngleType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:minInclusive value="-360"/>
            <xs:maxInclusive value="360"/>
            <xs:attribute name="unit" type="xs:string" use="optional" fixed="DEGREES">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="LatitudeBaseType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:minInclusive value="-90"/>
            <xs:maxExclusive value="90"/>
            <xs:attribute name="unit" type="xs:string" use="optional" fixed="DEGREES">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="LatitudeType">
    <xs:simpleContent>
        <xs:extension base="fsx:LatitudeBaseType">
            <xs:attribute name="datum" type="xs:NMTOKEN" use="optional" default="WGS84"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="LongitudeBaseType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:minInclusive value="-180"/>
            <xs:maxInclusive value="180"/>
            <xs:attribute name="unit" type="xs:string" use="optional" fixed="DEGREES">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="LongitudeType">
    <xs:simpleContent>
        <xs:extension base="fsx:LongitudeBaseType">
            <xs:attribute name="datum" type="xs:NMTOKEN" use="optional" default="WGS84"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="AzimuthType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:minInclusive value="0"/>
            <xs:maxExclusive value="360"/>
            <xs:attribute name="unit" type="xs:string" use="optional" fixed="DEGREES">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="DipType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:minInclusive value="-90"/>
            <xs:maxInclusive value="90"/>
            <xs:attribute name="unit" type="xs:string" use="optional" fixed="DEGREES">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="DistanceType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:attribute name="unit" type="xs:string" use="optional" default="METERS">
            <xs:attributeGroup ref="fsx:uncertaintyDouble"/>
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="FrequencyType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:attribute name="unit" type="xs:string" use="optional" fixed="HERTZ">
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:group name="SampleRateGroup">
    <xs:sequence>
        <xs:element name="SampleRate" type="fsx:SampleRateType">
        <xs:element name="SampleRateRatio" type="fsx:SampleRateRatioType" minOccurs="0">
    </xs:sequence>
</xs:group>
<xs:complexType name="SampleRateType">
    <xs:simpleContent>
        <xs:restriction base="fsx:FloatType">
            <xs:attribute name="unit" type="xs:string" use="optional" fixed="SAMPLES/S">
        </xs:restriction>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="SampleRateRatioType">
    <xs:sequence>
        <xs:element name="NumberSamples" type="xs:integer">
        <xs:element name="NumberSeconds" type="xs:integer">
    </xs:sequence>
</xs:complexType>
<xs:complexType name="PoleZeroType">
    <xs:sequence>
        <xs:element name="Real" type="fsx:FloatNoUnitType">
        <xs:element name="Imaginary" type="fsx:FloatNoUnitType">
    </xs:sequence>
    <xs:attribute name="number" type="xs:integer">
</xs:complexType>
<xs:simpleType name="CounterType">
    <xs:restriction base="xs:integer">
        <xs:minInclusive value="0"/>
    </xs:restriction>
</xs:simpleType>
<xs:complexType name="OperatorType">
    <xs:sequence>
        <xs:element name="Agency" type="xs:string">
        <xs:element name="Contact" type="fsx:PersonType" minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="WebSite" type="xs:anyURI" minOccurs="0">
    </xs:sequence>
</xs:complexType>
<xs:complexType name="PersonType">
    <xs:sequence>
        <xs:element name="Name" type="xs:string" minOccurs="0" maxOccurs="unbounded">
        <xs:element name="Agency" type="xs:string" minOccurs="0" maxOccurs="unbounded">
        <xs:element name="Email" type="fsx:EmailType" minOccurs="0" maxOccurs="unbounded">
        <xs:element name="Phone" type="fsx:PhoneNumberType" minOccurs="0" maxOccurs="unbounded">
    </xs:sequence>
</xs:complexType>
<xs:complexType name="SiteType">
    <xs:sequence>
        <xs:element name="Name" type="xs:string">
        <xs:element name="Description" type="xs:string" minOccurs="0">
        <xs:element name="Town" type="xs:string" minOccurs="0">
        <xs:element name="County" type="xs:string" minOccurs="0">
        <xs:element name="Region" type="xs:string" minOccurs="0">
        <xs:element name="Country" type="xs:string" minOccurs="0">
        <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
</xs:complexType>
<xs:complexType name="ExternalReferenceType">
    <xs:sequence>
        <xs:element name="URI" type="xs:anyURI">
        <xs:element name="Description" type="xs:string">
    </xs:sequence>
</xs:complexType>
<!-- Simple types -->
<xs:simpleType name="NominalType">
    <xs:restriction base="xs:NMTOKEN">
        <xs:enumeration value="NOMINAL"/>
        <xs:enumeration value="CALCULATED"/>
    </xs:restriction>
</xs:simpleType>
<xs:simpleType name="EmailType">
    <xs:restriction base="xs:string">
        <xs:pattern value="[\w\.\-_]+@[\w\.\-_]+"/>
    </xs:restriction>
</xs:simpleType>
<xs:complexType name="PhoneNumberType">
    <xs:sequence>
        <xs:element name="CountryCode" type="xs:integer" minOccurs="0">
        <xs:element name="AreaCode" type="xs:integer">
        <xs:element name="PhoneNumber">
            <xs:simpleType>
                <xs:restriction base="xs:string">
                    <xs:pattern value="[0-9]+-[0-9]+"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:element>
    </xs:sequence>
    <xs:attribute name="description" type="xs:string" use="optional"/>
</xs:complexType>
<xs:simpleType name="RestrictedStatusType">
    <xs:restriction base="xs:NMTOKEN">
        <xs:enumeration value="open"/>
        <xs:enumeration value="closed"/>
        <xs:enumeration value="partial"/>
    </xs:restriction>
</xs:simpleType>
<xs:complexType name="UnitsType">
    <xs:sequence>
        <xs:element name="Name" type="xs:string">
        <xs:element name="Description" type="xs:string" minOccurs="0">
    </xs:sequence>
</xs:complexType>
<xs:complexType name="IdentifierType">
    <xs:simpleContent>
        <xs:extension base="xs:string">
            <xs:attribute name="type" type="xs:string">
            </xs:attribute>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>
<xs:complexType name="BaseFilterType">
    <xs:sequence>
        <xs:element name="Description" type="xs:string" minOccurs="0">
        <xs:element name="InputUnits" type="fsx:UnitsType">
        <xs:element name="OutputUnits" type="fsx:UnitsType">
        <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="resourceId" type="xs:string">
    <xs:attribute name="name" type="xs:string">
    <xs:anyAttribute namespace="##other" processContents="lax"/>
</xs:complexType>
<xs:complexType name="ResponseType">
    <xs:sequence>
        <xs:choice minOccurs="0">
            <xs:element name="InstrumentSensitivity" type="fsx:SensitivityType" minOccurs="0">
            <xs:element name="InstrumentPolynomial" type="fsx:PolynomialType" minOccurs="0">
        </xs:choice>
        <xs:element name="Stage" type="fsx:ResponseStageType" minOccurs="0"
            maxOccurs="unbounded">
        </xs:element>
        <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="resourceId" type="xs:string">
    <xs:anyAttribute namespace="##other" processContents="lax"/>
</xs:complexType>
<xs:complexType name="DataAvailabilityExtentType">
    <xs:attribute name="start" type="xs:dateTime" use="required">
    <xs:attribute name="end" type="xs:dateTime" use="required">
    <xs:anyAttribute namespace="##other" processContents="lax"/>
</xs:complexType>
<xs:complexType name="DataAvailabilitySpanType">
    <xs:attribute name="start" type="xs:dateTime" use="required">
    <xs:attribute name="end" type="xs:dateTime" use="required">
    <xs:attribute name="numberSegments" type="xs:integer" use="required">
    <xs:attribute name="maximumTimeTear" type="xs:decimal" use="optional">
    <xs:anyAttribute namespace="##other" processContents="lax"/>
</xs:complexType>
<xs:complexType name="DataAvailabilityType">
    <xs:sequence>
        <xs:element name="Extent" type="fsx:DataAvailabilityExtentType" minOccurs="0"/>
        <xs:element name="Span" type="fsx:DataAvailabilitySpanType" minOccurs="0" maxOccurs="unbounded"/>
        <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:anyAttribute namespace="##other" processContents="lax"/>
</xs:complexType>