-- "Associates a context-free quantity to an observable property. While possible, we advise users to use quantifications associated with a context and validity: see Observation package."
++ "RSM 2022-06, continuation of RSM 1.2. This is a beta version."
-- "Baselines of the RSM 1.2 version released on internet in Decembre 2021."
-- "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."
++ "Associates a location to an element of the topology, via (at most) two extremities located on this element. "
++ "Associates a location to an element of the topology, via (at most) two extremities located on this element."
-- "Associates a location to an element of the topology. "
-- "Associates a location to an element of the topology."
++ "Quantity of type gradient, slope, ramp, inclination expressed as the tangent of rise/fall over distance. Uphill is positive, downhill is negative. Value in decimal form, not % or °/°°"
-- "Quantity of type gradient, slope, ramp, inclination expressed as the tangent of rise/fall over distance. Uphill is positive, downhill is negative."
++ "Geometric primitive for a horizontal transition curve. May be specialised to represent various types of transition curves and their associated parameters. "
++ "Geometric primitive for a horizontal transition curve. May be specialised to represent various types of transition curves and their associated parameters."
-- "Geometric primitive for a transition curves. May be specialised to represent various types of transition curves and their associated parameters. "
-- "Geometric primitive for a transition curves. May be specialised to represent various types of transition curves and their associated parameters."
-- "Any quantity that can be expressed with a number (cardinal or ordinal)"
++ "Linestring coordinates are expressed in one Positioning System. Define more linestrings if more positioning systems become relevant. May be left empty if linestring coordinates convey sufficient information about the positioning system."
-- "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."
++ "The height difference between the outer and inner rails in or in approach to a curve. The value is normally positive. It is negative in the exceptional case when the inner rail is higher. Corresponds to IFC4.3 IfcAlignmentCant attribute RailHeadDistance."
-- "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. "
++ "Linear Referencing Method Type ; values according to ISO 19148:2021 definitions."
-- "Linear Referencing Method values according to ISO 19148 definitions."
++ "Initial list of cant transition types. A union of the items proposed by IFC Rail and DB AG."
++ "linearScissors DE: Schere (lineare-)"
-- "Initial list of cant transition types."
-- "linear_scissors DE: Schere (lineare-)"