This XML schema file was generated by the EULYNX DataPrep workgroup. Detailed technical information is found on https://rsm.uic.org Vertical projection of the alignment curve. The vertical alignment is an ordered set of vertical segments. rsmCommon:VerticalAlignmentSegment An information source composed of other information sources. rsmCommon:InformationSource Defines a collection of NetElements that can aggregate into a higher level NetElement class. Elevation over a given reference surface defined by the associated positioning system, (e.g. EPSG 7699) The elevation value in units defined by the positioning system. A topological element that isn't (curvi-)linear, i.e. area or point. A temporal entity with zero extent or duration. One time value per reference system. RSM top-level class. The XSD generator can be hard coded so that the uuid attribute is restricted to the pattern (urn:uuid:)?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|\{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\} The XSD generator can be hard coded so that the ref attribute is restricted to the pattern (urn:uuid:)?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|\{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\} Unique identifier. A closed set of description levels. To describe the network at regional, national or international level. The non-linear elements are boundaries and major operational points (OPs); the linear elements are sections of lines connecting those points. To describe the tracks between the operational points (OPs, e.g. stations, yards, junctions, boundaries) of the network. The non-linear elements are the OPs, and the linear elements are the tracks connecting OPs. Micro level (for railways) is associated with tracks. It is the level where vehicle paths are unambiguous. At micro level, the smallest details aggregate into a single item. E.g. individual point components and point blades and tips coalesce into a single turnout. The nano level (for railway) is the level where track geometry and, in particular, curvilinear abscissas would be in agreement with on-board odometry. It is used for detailing crossing geometry, for instance. The nano level could be described as a properly attributed surveyor's map, including topological properties of the rail network in the finest possible granularity. Use cases for the Nano level would include interlocking and asset management. A closed polyline without any intersections. The first and last coordinate define the "closing" segment. States whether the relation connecting two NetElements is positioned at the start or end. The relation uses the start of the net element. The relation uses the end of the net element. Lateral inclination of an alignment curve. Applies to road, i.e. for describing cross section, and to railway, i.e. cant. Projection of the alignment curve on the horizontal plane. The horizontal alignment delivers the metric for the linear reference system used to position the vertical alignment segments and the cant segments. The horizontal alignment is an ordered set of horizontal segments. rsmCommon:HorizontalAlignmentSegment A reference system used to define Cartesian coordinates, (Northing/Easting) based on a map projection given by the EPSG code. A geometric point that is a sample of a discretised point set. The class can inform about the sampling process that produced this point. Allows to document the location in one or more reference system(s). Generalisation of w3c sosa:observation. Maintenance processes require that observed quantities (de:Istwert) could be compared with nominal or specified values (de:Sollwert), or with predicted quantities. The feature that is being observed and/or specified. rsmCommon:BaseObject Facet or attribute of an object referenced by a name. rsmCommon:ObservableProperty A list, i.e. an ordered set of NetElements that are part of the higher level. The sorting criteria aren't defined but may be established by specialising the class. Ordered list of references to Net Elements. rsmCommon:NetElement Sequence number of the list, allows creating list-of-lists. A temporal entity with an extent or duration Geometric primitive for segment with constant cant. The initial and final cant have equal values. Empty interval shall not be confused with zero-length interval. The empty interval has an empty intersection with any other interval. It is used to explicitly tell "never". Quantity of type gradient, slope, ramp, inclination expressed as the tangent of rise/fall over distance. Uphill is positive, downhill is negative. Associates a location to an element of the topology. Indicates the direction in which the function of the object along this linear element applies. Not given when irrelevant or without meaning. The bound(s) of the location on the associated net element. A spot location has one bound on each associated linear net element. A linear or area location has two bounds. rsmCommon:IntrinsicCoordinate Informs where the linear or spot location is situated with respect to the associated LinearElement. The net element that carries the location. rsmCommon:PositioningNetElement An instance of Network can be considered as a set of description levels (NetworkLevel) and a set of NetworkResource instances. A Network is described in at least one NetworkLevel. A Network may be described in more than one NetworkLevel, typically for different levels of detail. rsmCommon:NetworkLevel Reference to the resources that constitute the network. Resources can be shared by different networks. rsmCommon:NetworkResource Defines geographic or geodetic reference system used to position instances of NetElement or NetEntity. About epsgCode, see e.g. epsg.io. Name or code of the CRS. Use EPSG code when available (see https://epsg.org/home.html). e.g. WGS-84 for GPS coordinates or national CRS such as 5707 for Lambert-Nord (France), 28992 for RD (Netherlands). Informs about the units in which the coordinates are expressed, usually kilometres or metres. The possible values for Navigability. Navigation between elements A and B is possible in both directions. Generally applies to railway networks. Navigation is possible only from NetElement A to NetElement B. Navigation is possible only from NetElement B to NetElement A. No navigability (see design note). Intrinsic coordinate reflects the order of a feature along the linear element in the range [0,1]. Values 0 and 1 denote the extremities of a Linear Element. Intermediate values denote ordered intermediate locations along the topological element. Each location along the element can be associated with any number of coordinates expressed in a suitable positioning system. Nonlinear Elements can only have a Value of 0. Reference to coordinate(s) in one or more positioning system. No coordinates need to be associated in situations where only the order matters (e.g. schematic descriptions). rsmCommon:PositioningSystemCoordinate Value in the range [0,1] Depicts a specific description level and defines a consistent view of a network with a certain granularity. An instance of this class therefore includes all resources that are required to define the corresponding level. The concept of description level is central to the goal of computational efficiency. rsmCommon:NetworkResource Geometric primitive for curve with gradually changing cant. Length of the linear element, intended to support and simplify algorithms that use length and distance calculations. Note that the length typically is the distance along the 3D-alignment. Caution; this indicates that this length can be derived from the associated geometry. The user should clarify how this quantity was established and associate it with the observation circumstances; see this package for <a href="$package://{B2A724A9-ABD7-42d7-94E9-AFB9BDC703D4}">observation and measures</a>. An observable property as per <a href="$inet://https://www.w3.org/TR/vocab-ssn/#SOSAObservableProperty">w3c sosa ontology</a>. This class embodies all properties that need to be referenced by another class in this model (or a model using the present model). The observed quantity of the property. Multiplicity>1 applies to vector properties (hence "ordered"), or for expressing quantities in different units. Geometric primitive for an arc of circle. Radius of the arc. Set of consecutive straight segments (no branches) defined by successive coordinates. Can be specialized to e.g. prisms, for instance to define 3D "areas". Polylines are defined by reference to a sequence of at least two coordinates. There is no explicit constraint on coordinates being distinct. rsmCommon:PositioningSystemCoordinate Polyline coordinates are expressed in one Positioning System. Define more polylines if more positioning systems become relevant. May be left empty if polyline coordinates convey sufficient information about the positioning system. rsmCommon:PositioningSystem A device that measures a physical feature of an object resulting in one or more observations. Location that the sensor is observing. If the sensor is not a remote one, this is the location of the sensor itself. Atomic component in a specification. Holds specified (sometimes "nominal") value(s) (German "Sollwert") One defined value can be a vector (which implies subclassing of Quantity), a scalar, etc. The specified values of the observed properties. Provides basic information about location in the network topology information. "Location" is an abstraction for "some place in space that is used by some NetEntity". The location per se offers no information about position on earth. Quantity of type planar angle. Latitude, longitude and height (synonym: elevation) (ISO 19111). The datum and units are defined by the associated positioning system. Note: Altitude is a special kind of height (ISO 6709:2008), and not used here. Parametric curves representing the geometric alignment shapes. This information may be missing at early project stages (hence the 0..1 multiplicity). Defines the time frame in which a functional object is available in the field (from first placing into service to final de-commissioning). Also used for setting the time frame in which a regulation or reference system is in force. Composite intervals contain at least one interval, to which further intervals can be added or subtracted (in a set-theory sense). rsmCommon:Interval Superelevation of the track at a given spot location. Can be given in terms of height difference between the rails and/or angle. The cant angle with respect to horizontal. Positive when the rotation is anti-clockwise with respect to the orientation of the linear element that carries the segment. A spot location where the cant applies. rsmCommon:SpotLocation The height difference between the outer and inner rails in or in approach to a curve. Positive when the rotation is anti-clockwise (seen from above) with respect to the orientation of the linear element that carries the segment. The property extends over the whole network, at any location that is (or may be) associated with the network (via AssociatedNetElement). Quantity of type length, distance, height, width, etc. A geometric primitive for constructing a vertical alignment. The elevation at the end of the segment. rsmCommon:ElevationAndInclination Mapping to a linear location on the topology. The linear location can be associated with position in one or more coordinate systems, including elevation. The elevation at the start of the segment. rsmCommon:ElevationAndInclination The length of the segment when projected on the vertical surface. The length is optional because it may be irrelevant or may be derived from position information associated with the linear location. A defined numerical value(s) and textual definition(s) of a measurement scale. See this <a href="$inet:// http://www.omgwiki.org/OMGSysML/lib/exe/fetch.php?media=sysml-qudv:annex_c.5_2009-08-26.pdf">OMG document</a>, figure C8. Specifies the textual definition for the value. Specifies the numerical value. Orientation with respect to the topological element. Orientation is normal. Orientation is reverse. ISO19148:2012 : LR_AlongReferent. attributes (or references to) measure, and measure from previous (or: to next), are not needed, because anchor points, being spot locations, are expected to be provided with coordinates. The anchor point applies to this linear positioning system. rsmCommon:LinearPositioningSystem Informs the spot location of the anchor point. rsmCommon:SpotLocation The distance measure is given with respect to this anchor point. If absent, the measure is counting from the origin of the LRS. Reference to the previous anchor point on the linear positioning system. Anchors are ordered in the direction of the net element that carries them, or according to the sequence of net elements if there is more than one. rsmCommon:AnchorPoint A temporal interval or instant. The property applies to a set of location(s). rsmCommon:BaseLocation From W3C: Description of date and time structured with separate values for the various elements of a calendar-clock system. The temporal reference system is fixed to Gregorian Calendar. The reference to TRS may be left out if obvious from the context. Geometric primitive for vertical transition curves. The radius of the circle tangential to the end of the segment. Start and end with respect to the orientation of the linear element of the topology that carries the segment. The radius of the circle tangential to the beginning of the segment. Start and end with respect to the orientation of the linear element of the topology that carries the segment. Any scalar value with no dimension. Range can be 0 to 1 in case of percentages (not: 0 to 100). Continuous time interval between start and end. Start and end instants can be included or excluded. At most one end time value per reference system. Allows defining a "floating" time interval, i.e. not anchored to a start or end moment in time. At most one start time value per reference system. The application direction with respect to the direction of the associated linear element. The application direction is (yet) unknown. The located object is valid in the direction of the LinearElement. The located object is valid in the reverse direction of the LinearElement. The located object is valid in both directions. Geometric primitive for a transition curves. May be specialised to represent various types of transition curves and their associated parameters. Radius at the end of the segment. The radius of the circle tangential to the beginning of the segment. Start and end with respect to the orientation of the linear element of the topology that carries the segment. Type of transition curve. The value of an observable, i.e. measurable, property of a NetEntity or other physical object. Type "double" is given because it is most generally applicable, and UML2.5 does not provide abstract supertypes. Given if not implied by the quantity specialisation. rsmCommon:QuantityKind rsmCommon:Unit Scale of measurement of a quantity, e.g. Celsius, Kelvin, Beaufort, Richter. A measurement scale is an ordered set of quantity values of quantities of a given kind of quantity used in ranking, according to magnitude, quantities of that kind. A scale may need a unit (e.g. degree for Celsius). The unit in which the value of each valueDefinition is expressed rsmCommon:Unit Ordered set of ScaleValueDefinition that specifies the defined numerical value(s) and textual definition(s) for the measurement scale A position on a time-line The reference to a time reference system replaces the reference to a unit. May be left out if the TRS is obvious and /or unambiguous from the context, e.g. "Document released 2021-06-28" rsmCommon:TimeReferenceSystem To express "as far as memory goes back" or "until an undefined date". This is the Null Object Pattern in disguise. It is used to explicitly allow open-ended intervals without using ambiguous optional values ("forever" is neither synonymous with "until an undetermined date" nor "until an undocumented date"). Subclasses can be created to express even nuances. Base class for defining nodes in the connectivity graph representing the topological network. Initial list of cant transition types. Monotonic increase or decrease of cant. FR : doucines; DE: S-Rampe DE: Schere (lineare-) Not yet known, to be determined. Not defined, irrelevant. The type of cant shape is defined by the name-attribute or by a subclass. Cant, or lateral inclination, of a railway track. The railway cant alignment is composed of one or more ordered geometric segments. rsmCommon:AlignmentCantSegment Abstract property class, needed to implement the composite pattern. The property applies to the referenced object. rsmCommon:BaseObject Definition of the property in plain text. Reference to a (normative) document to support the unambiguous definition of the property. A geometric primitive for quantifying and locating cant segments. Cant at the end of the segment. Begin and end are with respect to the linear topological element that carries the segment. rsmCommon:Cant Cant at the beginning of the segment. Begin and end are with respect to the linear topological element that carries the segment. rsmCommon:Cant Mapping to a linear location on the topology. Informs that a smoothing was applied between this segment and the segment(s) that are referred to. For compatibility with IFC Rail, as it redunds the other, proposed transition definition (class TransitionShape) rsmCommon:AlignmentCantSegment Group of properties. Intended grouping is by "mechanical properties", "actual state", or similar, rather than sampled values of the same properties. A property set refers to an ordered set of base properties. rsmCommon:BaseProperty Property observed on a network (or a subset thereof or a set of), according to a definite source of information and yielding a definite value over a definite location. rsmCommon:Network rsmCommon:ElementarySource rsmCommon:BaseProperty rsmCommon:ObservableProperty A resource, tangible or intangible, that has a name. Any quantity that can be expressed with a number (cardinal or ordinal) Predictions class, to hold predicted values that can be compared with specified and/or observed values. Geographic direction, viewed from toe to heel. Used for relations underpinning turnouts. Not normative - this enumeration is provided for convenience, esp. in the context of schematic representation. Abstract class to store meta-information items about the observation process. See w3c sosa/ssn concepts in relation with observations. An unordered collection has no specific begin and end. Unordered set of references to NetElements. rsmCommon:NetElement Defines location information as a linear shape (no branches) with a start- and end point. A linear location is topologically carried by a sequence of associated net elements. Multiplicity > 1 for the case several positioning systems are used. A set of points that can be spot-located. Typically the product of a position sampling process such as a land survey, photogrammetry, a measurement campaign with satellite receivers or a mix of these. Allows defining a subset of discretised points. rsmCommon:DiscretisedPointSet Geometric primitive for a vertical arc of circle. Radius of the arc. Defines spot location information for a LocatedNetEntity instance. Associates the location with net element(s). The spot location is positioned in a given coordinate reference system that is typically independent of the network topology. rsmCommon:PositioningSystemCoordinate Aggregation of elements (nodes of the topological network) into bigger nodes. This allows defining network level(s) to zoom in and out, showing or hiding levels of detail. A higher level net element is composed of a collection of lower level net elements. A geometric primitive for constructing a horizontal alignment. Azimuth at the end of the segment. Not normally needed for straight line segments. Mapping to a linear location on the topology. The linear location can be associated with position in one or more coordinate systems. Initial azimuth of the segment, or bearing, the clockwise angle departing from geographic north. The azimuth is optional because it is either irrelevant or may derive from position information associated with the segment. The length of the segment when projected on the horizontal plane. The length is optional because it may be irrelevant or may be derived from position information associated with the linear location. Aspect common to mutually comparable quantities. A quantity of a given kind contains a numerical value expressed in a particular measurement unit. An URI pointing to a standard definition of the quantity kind. The symbol used to describe the kind of quantity, e.g. l for length. A referencing system for locations relative to a one-dimensional object (reference line) as measurement along (and optionally offset from) that object. For reference, see EN 19148:2021. A linear positioning system combines a line of reference (here: a collection of PositioningNetElements) with a single number (linear abscissa, i.e. an instance of class LinearCoordinate) allowing positioning within a railway network, at the chosen level (MACRO, MICRO...). Often called chainage (when yielding the actual "distance along"), or mileage system (when reflecting a conventional kilometric post or mile post system). The start- and end-measures (optional) provide the valid range of linear coordinates within the chosen linear positioning system. The difference between two coordinates is not necessarily the "true distance along" because of possible deviations (jumps or systematic errors), that are taken care of by anchor points and linear referencing methods. The units of linear abscissa are the same as the start and end-measure. The highest value of the abscissa in this system. ISO19148:2021, 4.9: LR_LinearElement The lowest value of the abscissa in the positioning system. From W3C: A temporal position described using either a (nominal) value from an ordinal reference system, or a (numeric) value in a temporal coordinate system Not from W3C: example: on-board clock. Cant transition rules that apply to the segment. Users may fill the inherited name, long name attributes and/or subclass and add calculation methods. From W3C: Description of date and time structured with separate values for the various elements of a calendar-clock system The user is highly recommended to use a standard notation such as XML Schema xs:date, xs:dateTime or xs:dateTimeStamp Defines an oriented relation between two PositioningNetElements. Connects to PositioningNetElement A. rsmCommon:PositioningNetElement Connects to PositioningNetElement B. rsmCommon:PositioningNetElement Viewed from the toe, the positioned relation connects a left or right branch. Indicates the direction of possible travel between elements A and B. Not intended to express operational traffic direction. This should be modelled with appropriate signalling classes. The relation is with the start or end of NetElement A. The relation is with the start or end of NetElement B. Resistance against speed change. Includes the effect of rotating masses. Typically applies to rolling stock. A spatial reference system in which a position can be expressed in terms of coordinates. rsmCommon:ValidityPeriod Class holding the definition of a geometrical element in 3-D space, as a set of equations, possibly involving up to six coordinates (e.g. x, y, z, rho, theta, phi). Pointer to the CRS in which the equations are expressed. rsmCommon:GeographicCoordinateSystem rsmCommon:LinearLocation A set of coordinates in a given geometric positioning system. Placeholder class when time values cannot be provided Topology elements are stable in time, or at least do not vary often. Position of topology elements may vary faster, e.g. depending on measures. This class tells which positions, expressed by coordinates, are valid and during which period in time. associates the net element with intrinsic coordinates. rsmCommon:ValidityPeriod A 2-D or 3-D physical or virtual bounded space, such as a screen or a sheet of paper on which the positioning takes place. The name can imply size and unit information, e.g. A3 landscape for 420 mm wide x 297 mm high. Information about the canvas that is not implied by the name. Typically describing the place of the origin and orientation of the axes. height of the canvas in a given unit, e.g. mm or pixel Width of the canvas in a given unit (e.g. mm or pixel) if not implied in the canvas name. A one-dimensional topological (curvi-)linear element. A curvilinear abscissa ("distance along"), optionally with vertical and lateral offset. The units are defined by the associated positioning system. ISO19148:2012: LR_PositionExpression. Please note that the concepts match: in ISO19148, LR_PositionExpression refers to exactly 1 distance expression (here: instance of Length), one linear element (here: one reference line, via the reference to positioning system), and one linear referencing method (here: referred to via the linear positioning system). Lateral offset. The sign is always positive and the side, left or right, is given by the spot location's lateral side. Distance from the anchor point. ISO19148:2021: used if LR method is "relative". rsmCommon:AnchorPoint Vertical offset. Can be positive or negative. A geometric point that is a sample of a railway alignment. Can bear geometric properties that cannot be represented by SpotLocation, e.g. twist or the rotation of some local coordinate system, locally measured cant values, etc. Cartesian coordinates. The x,y, z units are defined by the associated positioning system. The user may retain only elevation (z) if needed, e.g. in conjunction with linear coordinates (distance along). X-coordinate in associated positioning system. Y-coordinate in associated positioning system. Z-coordinate, i.e. height over datum level, in associated positioning system. A tuple of coordinates in a given positioning system. Reference to the reference system in which the coordinate is defined. rsmCommon:PositioningSystem A location associated with a time stamp The lateral side with respect to the orientation of the linear element (extremity 0 to extremity 1). The lateral side is not yet defined/known although the spot located object is or will be placed to the left or right of the track. Can be used at early planning stages. The actual lateral side can then be given at a later stage, e.g. as-built. Centered on the linear element. Every object of the network is qualified as a resource. A topologically closed area. An area location is composed of a set of associated net elements. A tuple of elevation and inclination. The location is either given by the linear location or by a spot location. Inclination with respect to the horizontal plane, in the direction of the associated linear element. The spot location, including an elevation. rsmCommon:SpotLocation Geometric primitive for a straight linear segment. The unit used to express a quantity. An URI pointing to a standard definition of the unit. The symbol used to describe the unit. A temporal reference system, such as a temporal coordinate system (with an origin, direction, and scale), a calendar-clock combination, or a (possibly hierarchical) ordinal system. A taxonomy of temporal reference systems is provided in ISO 19108:2002 [ISO19108], including (a) calendar + clock systems; (b) temporal coordinate systems (i.e. numeric offset from an epoch); (c) temporal ordinal reference systems (i.e. ordered sequence of named intervals, not necessarily of equal duration). Used for specifying exclusions, such as "steel sleepers are not allowed, anywhere on the network". Act of measuring or otherwise determining the value of a property (ISO 19156 (2011)). As per <a href="$inet://https://www.w3.org/TR/vocab-ssn/#SOSAObservation">w3c sosa ontology</a>. rsmCommon:Circumstance As per SOSA ontology, a result is a quantity that is the product of an observation. "Quantity" could well be a vector. In RSM context, a vector is an ordered list of results. A specific class could also be envisaged. The observation is acquired by a sensor. rsmCommon:Sensor Raw reading of a sensor or measurement device. A linear element that is given a length. This length is used for practical computational purposes. Duration of a temporal extent expressed as a number scaled by a temporal unit. Linear Referencing Method values according to ISO 19148 definitions. Distance along, measured from the intersections (junctions) where linear elements meet. Curvilinear abscissa ("distance along" linear element). Values do not necessarily start with zero. Fraction (percentage) of distance along linear element. Informs where the Net Property applies. Quantity of type mass. Geometric primitive for a straight line segment representing a slope of constant elevation angle. Base class for defining edges in the connectivity graph representing the topological network. Defines the ellipsoid on which latitude and longitude are given. Topological element connected and oriented in the network by means of oriented relations. An element of the topology can be positioned in terms of coordinates. This is useful only for intrinsic coordinates with value 0 and 1. Quantity of type speed or celerity. A resource, tangible or intangible, that has a name.