describes an axis and its properties describes an axis and its properties minimum size of an interpretable signal along this axis How the observation is spanned along this axis redefinition of unit for coverage redefinition of coordsystem Typical value on one axis the limits of the observation on this axis describes the area where measurements are effectively present and interpretable encodes the variability of response along the axis A name representing the physical nature of the axis like Spatial, Spectral, Time, Velocity or any other free name for an axis The physical meaning of the axis, Type: standard semantic tag defined in the UCD list. default unit for the axis: Type: controlled unit vocabulary following the VOTable units definitions Reference coordinate system for the axis: Observatory location Type: a STC:observatoryLocationType or an xlink Global accuracy description of the axis Indicates wether the axis is independent or not from the other axes. The Observable axis has a false independentAxis "value" Type : boolean defines if and how the axis is calibrated: Possible String values: CALIBRATED, UNCALIBRATED, RELATIVE, NORMALIZED Number of bins for this axis. Type : array of 1 2 or 3 integers A flag to mention wether the data are undersampled. Type: boolean A flag to mention wether the data are regularly sampled. Type : boolean Restriction of CharacterisationAxis for Spatial Axis Restriction of characteristionAxis for Spectral Axis Restriction of CharacterisationAxis for time A combination of flags attesting the data quality. Type: String Some Error on the axis The type of error described : statistical , systematic, global, etc. Type: string Statistical Error on the axis The type of error described : here statistical Type : string , value="statistical" " Typical statistical Error on the axis Range of the error for mapping along this axis A detailed description of the local error values Systematic Error on the axis The type of error described : here, systematic Type: string , value: systematic Typical statistical error on the axis. Types: depend on the dimensionality 1D Error based on stc:double1Type 2D Errors based on stc:size2Type, double2Type or double1Type (error 2 radius) 3D Errors based on stc:size3Type, double3TYpe or double1Type (error 3 radius) Hi and Low values of statistical errors on this axis. Type: stc:coordScalarInterval, 2DVecInterval or 3DVecInterval A description of the error extreme values . Type: any URI type A detailed description of the local error values. Could be conveyed with the data as in IVOA Spectrum data model Type: any URI type pointing to such a map A map showing the variability of the error Type: any URI type documentation on the Error variation Type: any URI type The typical coordinate value Type: stc:astroCoordsType Redefinition of unit Redefinition of coordsystem The typical coordinate value Type: stc:astroCoordsType for bounds unit redefinition for bounds coosys redefinition The actual values defining the bounds. 2 possible types : a cha:CharBox which is a customised STC:Coordinate with mandatory value and size or an STC:Interval A document to mention how the bounds are defined. Defines the effective covered region Gives the name of the region shape Type: predefined string in {Circle, Polygon, Box, ...} Some text about the Support region definition Type: any URI type encodes the variability of the response along the axis documents the purpose, type and encoding of sensitivity information Type: URL A coordinate type to define n-D bounding boxes. To be overridden by any of the following possible substitution elements. Here is 1-, 2-, or 3-D coordinate interval substitution group head element. Such an element needs to contain a minimum or maximum scalar or vector value, or both. It needs to refer to a coordinate system. Boundaries may or may not be inclusive; and it can have a fill factor A scalar coordinate interval A 2-D coordinate interval ("box") A 3-D coordinate triplet interval ("cube") Defines and explains how this reference value for resolution has been estimated Type: URL Typical resolution value along the axis 1D resolution of type stc:double1Type 2D resolution of type stc:size2Type, double4Type or double1Type (resolution radius) 3D resolution of type stc:size3Type, double9TYpe or double1Type (resolution 3 radius) Explains how the fill factor is estimated . Type: URI Explains how the fill factor is estimated . Type: URI Typical sampling Period value of the axis Type : depends on the dimensionality 1D samplingPeriod based on stc:double1Type 2D samplingPeriod based on stc:size2Type, double4Type or double1Type ( sampling period radius) 3D samplingPeriod based on stc:size3Type or double9TYpe or double1Type (sampling period 3 radius) Typical sample Extent value of the axis "Types : depend on the dimensionality" 1D sampleExtent based on stc:double1Type 2D sampleExtent based on stc:size2Type, double4Type or double1Type (sampling extent radius) 3D sampleExtent based on stc:size3Type, double9TYpe or double1Type (sampling extent 3 radius) Defines and explains how this resolution has been estimated Hi and Low values of resolution on this axis. Type: stc:coordScalarInterval, or 2Vec or 3Vec Hi and Low values of samplingPeriod on this axis. Type: stc:coordScalarInterval or 2Vec or 3Vec Defines and explains how this resolution has been estimated Type: URL A place to hook some explanations about "how" the Sampling was done and assessed. Type: URI This map describes the variability of the resolution along the axis, the varying shape of the point spread fonction, or both. Can be attached to the data Type: URI defines and explains how this resolution has been estimated Type: URL This map describes the variability of the sampling along the axis, or the varying shape of the sampling fonction, or both. Can be attached to the data implemented as anyURI type