OSLC Estimation and Measurement Service (EMS) Vocabulary

The namespace URI for this vocabulary is:

http://open-services.net/ns/ems#

This vocabulary defines estimation and measurement resources and a service for managing them in projects. Some terms of this vocabulary have been finalized for use by OSLC Performance Monitoring 2.0.

Label: OSLC EMS Vocabulary

See Also:

This document lists the RDF classes, properties, and individuals that are defined by this vocabulary. Following W3C best practices, this vocabulary is available as HTML (this document) and as RDF source.

More details about how this page was generated, and other related material, can be found in OSLC Core URI Naming Guidance.

Classes defined by this vocabulary(50):

Baseline, BaselineList, CdfPoint, CumulativeDistributionFunction, Dimension, DimensionCell, DimensionColumn, DimensionMember, EffortMetric, Estimate, EstimateList, Fact, FactDistribution, FactDistributionTable, FactTable, FinancialMetric, Format, Grain, Head, Map, Mapping, Measure, MeasureCell, MeasureColumn, MeasureDistribution, MeasureDistributionCell, Measurement, MeasurementList, Metric, NormalDistribution, PointEstimate, PoissonDistribution, ProbabilityDistribution, ProcessMetric, ProductivityMetric, Project, ProjectList, Quantile, QuantileFunction, ReliabilityMetric, Scenario, ScenarioList, Service, SizeMetric, TimeMetric, TriangularDistribution, UniformDistribution, UnitOfMeasure, WbsFormat, WorkBreakdownStructure

Properties defined by this vocabulary(66):

assumes, assumesTable, assumesWbs, baselineList, cdfPoint, currentBaseline, dimension, dimensionCell, dimensionColumn, dimensionMember, distribution, estimate, estimateList, extendsScenario, fact, from, grain, head, high, inColumn, isActive, isClosed, lambda, low, map, mapping, measureCell, measureColumn, measureDistributionCell, measurementList, memberBaseline, memberEstimate, memberMeasurement, memberProject, memberScenario, metric, mostLikely, mu, numberOfQuantiles, numericValue, observes, observesTable, observesWbs, predicts, predictsTable, predictsWbs, probability, project, projectList, quantile, realProjectId, scale, scenario, scenarioList, seeAlsoEstimation, seeAlsoPerformance, seeAlsoPortfolio, seeAlsoProject, service, tableSource, to, unitOfMeasure, useMap, wbsContent, wbsFormat, wbsSource

Individuals defined by this vocabulary(0):

None.

Prefixes defined in this vocabulary:

PrefixURI
dimension:http://open-services.net/ns/ems/dimension#
dimension-member:http://open-services.net/ns/ems/dimension-member#
ems:http://open-services.net/ns/ems#
format:http://open-services.net/ns/ems/format#
grain:http://open-services.net/ns/ems/grain#
metric:http://open-services.net/ns/ems/metric#
unit:http://open-services.net/ns/ems/unit#

Pre-defined standard prefixes:

PrefixURI
dcterms:http://purl.org/dc/terms/
oslc:http://open-services.net/ns/core#
owl:http://www.w3.org/2002/07/owl#
rdf:http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs:http://www.w3.org/2000/01/rdf-schema#
xsd:http://www.w3.org/2001/XMLSchema#

assumes

ems:assumes is an RDF property.

This property links a scenario to the assumed value for some measure, e.g. duration, size. The assumed value is a probability distribution.

Status: testing

Label: assumes

Type: rdf:Property

Has domain:

Has range:

assumesTable

ems:assumesTable is an RDF property.

This property links a scenario to the assumed value for some fact table of measures, e.g. staffing by week. The assumed fact table contains probability distributions.

Status: testing

Label: assumesTable

Type: rdf:Property

Has domain:

Has range:

assumesWbs

ems:assumesWbs is an RDF property.

This property links a scenario to the assumed work breakdown structure.

Status: testing

Label: assumesWbs

Type: rdf:Property

Has domain:

Has range:

Baseline

ems:Baseline is an RDF class.

A baseline is a set of estimates, based on some scenario, that are used to track the performance of a project.

Status: testing

Label: Baseline

Type: rdfs:Class

Is range of:

See Also:

BaselineList

ems:BaselineList is an RDF class.

A baseline list is a container for baseline resources.

Status: testing

Label: BaselineList

Type: rdfs:Class

Is domain of:

Is range of:

See Also:

baselineList

ems:baselineList is an RDF property.

This property links a service to its baseline list.

Status: testing

Label: baselineList

Type: rdf:Property

Has domain:

Has range:

CdfPoint

ems:CdfPoint is an RDF class.

This class describes a point on the graph of a cumulative probability function. The cumulative probability at a point is given by ems:probability. The cumulative probability MUST be greater than 0 and less than 1. The measurement value is given by ems:numericValue.

The probability that a measurement gives a value less than or equal to the numeric value is equal to the cumulative probability.

Status: testing

Label: CdfPoint

Type: rdfs:Class

Is range of:

See Also:

cdfPoint

ems:cdfPoint is an RDF property.

This property links a cumulative probability function resource to one or more points on its graph.

Status: testing

Label: cdfPoint

Type: rdf:Property

Has domain:

Has range:

CumulativeDistributionFunction

ems:CumulativeDistributionFunction is an RDF class.

A cumulative distribution function (cdf) is a probabilty distribution defined by giving the cumulative probability at an increasing sequence of measurement values. The range of possible measurement values may be unbounded. If a lower bound exists, it is given by ems:low. If an upper bound exists, it is given by ems:high.

The graph of the cumulative distribution function is given by a set of measurement values at an increasing sequence of cumulative probabilities between 0 and 1. The cumulative probability values are given by one or more ems:cdfPoint properties.

Status: testing

Label: CumulativeDistributionFunction

Type: rdfs:Class

Is subclass of:

Is domain of:

See Also:

currentBaseline

ems:currentBaseline is an RDF property.

This property links a project to its current baseline.

Status: testing

Label: currentBaseline

Type: rdf:Property

Has domain:

Has range:

Dimension

ems:Dimension is an RDF class.

A dimension is some aspect of an aggregated quantity which lets the aggregate be analyzed. For example, the total effort expended in a project can be analyzed by week or month. Therefore time (dimension:Time) is a dimension of effort (metric:Effort).

Status: testing

Label: Dimension

Type: rdfs:Class

Is range of:

See Also:

dimension

ems:dimension is an RDF property.

This property links a resource to a dimension.

Status: testing

Label: dimension

Type: rdf:Property

Has range:

DimensionCell

ems:DimensionCell is an RDF class.

This class describes a dimension cell in a row of a fact table. A dimension cell refers to its column (see ems:inColumn and has a dimension member (see ems:dimensionMember).

Status: testing

Label: DimensionCell

Type: rdfs:Class

Is range of:

See Also:

dimensionCell

ems:dimensionCell is an RDF property.

This property links a fact row to one or more of its dimension cells.

Status: testing

Label: dimensionCell

Type: rdf:Property

Has range:

DimensionColumn

ems:DimensionColumn is an RDF class.

This class describes a dimension column in a fact table. A dimension column has a dimension (see ems:dimension) and grain (see ems:grain and may refer to a map (see ems:useMap.

Status: testing

Label: DimensionColumn

Type: rdfs:Class

Is range of:

See Also:

dimensionColumn

ems:dimensionColumn is an RDF property.

This property links the head of a fact table to one or more ems:DimensionColumn resources that define dimension columns. Every fact table MUST have at least one dimension column.

Status: testing

Label: dimensionColumn

Type: rdf:Property

Has range:

DimensionMember

ems:DimensionMember is an RDF class.

A dimension member is some subset of a dimension. For example, work on a project is performed by people in various roles. It is often of interest to break down an effort estimate or measurement by role. Members of the dimension role (dimension:Role) include manager (dimension-member:Manager and programmer (dimension-member:Programmer).

Status: testing

Label: DimensionMember

Type: rdfs:Class

Is range of:

See Also:

dimensionMember

ems:dimensionMember is an RDF property.

This property links a dimension cell to its dimension member.

Status: testing

Label: dimensionMember

Type: rdf:Property

Has range:

distribution

ems:distribution is an RDF property.

This property links a resource, e.g. ems:MeasureDistribution to a probability distribution.

Status: testing

Label: distribution

Type: rdf:Property

Has range:

EffortMetric

ems:EffortMetric is an RDF class.

An effort metric is a metric that measures the effort of effort required to perform some task. For example, effort as measured in person-months, person-years, etc. (metric:Effort), average staffing (metric:Staffing), peak staffing (metric:PeakStaffing), and full-time equivalents (metric:FullTimeEquivalent) are effort metrics.

Status: testing

Label: EffortMetric

Type: rdfs:Class

Is subclass of:

See Also:

Estimate

ems:Estimate is an RDF class.

An estimate is a probabilistic prediction, based on a scenario, for a set of measurements.

Status: testing

Label: Estimate

Type: rdfs:Class

Is domain of:

See Also:

estimate

ems:estimate is an RDF property.

The property links a resource to an estimate.

Status: testing

Label: estimate

Type: rdf:Property

Is range of:

Has range:

EstimateList

ems:EstimateList is an RDF class.

An estimate list is a container for estimate resources.

Status: testing

Label: EstimateList

Type: rdfs:Class

Is range of:

See Also:

estimateList

ems:estimateList is an RDF property.

This property links a service to its estimate list.

Status: testing

Label: estimateList

Type: rdf:Property

Has domain:

Has range:

extendsScenario

ems:extendsScenario is an RDF property.

This property links a scenario a base scenario that it extends. The base scenario contains assumptions that can be included in several other extended scenarios.

Status: testing

Label: extendsScenario

Type: rdf:Property

Has domain:

Has range:

Fact

ems:Fact is an RDF class.

This class describes a row of a fact table (see ems:FactTable). Each fact row has a set of dimension cells (see ems:DimensionCell) and measure cells (see ems:MeasureCell). These MUST match the description of the columns given in the head of the fact table (see ems:Head).

Status: testing

Label: Fact

Type: rdfs:Class

Is range of:

See Also:

fact

ems:fact is an RDF property.

This property links a fact table to its fact rows. In general, a fact table will have many fact rows. If the fact table has an ems:tableSource property, then the rows of the fact table MUST be a copy of the data values received in the response of an HTTP GET request of the URL of the remote table source.

Status: testing

Label: fact

Type: rdf:Property

Has range:

FactDistribution

ems:FactDistribution is an RDF class.

A fact distribution is a row of a fact distribution table (see ems:FactDistributionTable). It contains one or more dimension cells (see ems:dimensionCell) and one or more measure distribution cells (see ems:measureDistributionCell).

Status: testing

Label: FactDistribution

Type: rdfs:Class

See Also:

FactDistributionTable

ems:FactDistributionTable is an RDF class.

A fact distribution table is a fact table that contains probability distributions instead of precise numeric values for its measures. Fact distribution tables are used in scenario assumptions (see ems:assumesTable) and estimate predictions (see ems:predictsTable).

A fact distribution table is similar to a fact table (see ems:FactTable), except that it has fact distribution rows (see ems:FactDistribution) instead of fact rows (see ems:Fact), and they have measure distribution cells (see ems:MeasureDistributionCell) instead of measure cells (see ems:MeasureCell).

Status: testing

Label: FactDistributionTable

Type: rdfs:Class

Is range of:

See Also:

FactTable

ems:FactTable is an RDF class.

This class is used to represent fact tables.

Consider the work performed on a project. Work may be analyzed according to attributes such as who performed the work, the task or activity that the work accomplished, when the work was performed, etc. These attributes are referred to as dimensions.

Work may be quantified by such metrics as its effort in person-hours, its cost in some currency, its duration in months, its peak staffing, etc. These quantities are referred to as measures.

The term dimension is used because the measures can be regarded as occupying cells in a multi-dimensional array (sometimes referred to as a datacube). It is frequently of interest to summarize the measures along a dimension, for example given the effort by activity, calculate the total effort for all activities. Conversely, given the total effort, it may be of interest to see how it is broken down by activity.

In general, set of related measures, analyzed along a set of dimensions may be organized into a fact table. Each row of a fact table contains a set of measures (e.g. effort and cost) for a given combination of dimension values (e.g. activity and month).

This resource MAY contain the actual measurements, provide a link to the source of the actual measurements, or contain both a link to the source and a copy of the actual measurements obtained from the source (i.e. a cached copy of the source).

Status: testing

Label: FactTable

Type: rdfs:Class

Is range of:

See Also:

FinancialMetric

ems:FinancialMetric is an RDF class.

A financial metric is a metric that measures the cost of an artifact or work effort. For example, total cost (metric:Cost) and labor cost (metric:LaborCost) are financial metrics.

Status: testing

Label: FinancialMetric

Type: rdfs:Class

Is subclass of:

See Also:

Format

ems:Format is an RDF class.

A format is a specification of the syntax of an artifact.

Status: testing

Label: Format

Type: rdfs:Class

Has subclass:

See Also:

from

ems:from is an RDF property.

This property links a mapping to its custom label value. The value MUST be unique within its enclosing map resource.

Status: testing

Label: from

Type: rdf:Property

Has domain:

Grain

ems:Grain is an RDF class.

Dimensions may be aggregated into subsets of various sizes. A grain is a unit of aggregation of a dimension. For example, month (grain:CalendarMonth) and week (grain:CalendarWeek) are grain sizes for the dimension time (dimension:Time).

Status: testing

Label: Grain

Type: rdfs:Class

Is range of:

See Also:

grain

ems:grain is an RDF property.

This property links a resource to a grain.

Status: testing

Label: grain

Type: rdf:Property

Has range:

ems:Head is an RDF class.

This class defined the columns of a fact table. A fact table MUST have one or more dimension columns, e.g. date or role, and one or more measure columns, e.g. cost or effort. The dimension columns contain dimension values. Dimension columns SHOULD contain standard dimension values when they exist, e.g. for roles. The creator of the fact table MAY use custom dimension dimension values and record how these custom values are mapped to the standard values.

Status: testing

Label: Head

Type: rdfs:Class

Is range of:

See Also:

ems:head is an RDF property.

This property links a fact table to an ems:Head resource that describes the columns of the table.

Status: testing

Label: head

Type: rdf:Property

Has range:

high

ems:high is an RDF property.

This property gives the high parameter value of a probability distribution.

Status: testing

Label: high

Type: rdf:Property

Has domain:

See Also:

inColumn

ems:inColumn is an RDF property.

This property links a cell to its column. Dimension cells (see ems:DimensionCell) are linked to dimension columns (see ems:DimensionColumn). Measure cells (see ems:MeasureCell) are linked to measure columns (see ems:MeasureColumn).

Status: testing

Label: inColumn

Type: rdf:Property

isActive

ems:isActive is an RDF property.

This boolean property indicates if a scenario is under active consideration. When a scenario has been ruled out, it is marked as inactive by setting this property to <code>false</code>.

Status: testing

Label: isActive

Type: rdf:Property

Has domain:

isClosed

ems:isClosed is an RDF property.

This boolean property indicates if the project is closed. No further activities or measurements are done on closed projects. The measurements of closed projects can be used to calibrate the estimates for new projects. When a project is completed and all measurements on it have been performed, it is marked as closed by setting this property to <code>true</code>.

Status: testing

Label: isClosed

Type: rdf:Property

Has domain:

lambda

ems:lambda is an RDF property.

This property gives the lambda parameter value of a Poission distribution.

Status: testing

Label: lambda

Type: rdf:Property

Has domain:

low

ems:low is an RDF property.

This property gives the low parameter value of a probability distribution.

Status: testing

Label: low

Type: rdf:Property

Has domain:

See Also:

Map

ems:Map is an RDF class.

Some key dimensions may define standard dimension member URIs which are used for data interchange. However, users may wish to use custom values. This class lets you define how custom values are mapped to standard URIs. You can include an map resource in the description of a dimension column of a fact table (see ems:useMap).

We make the simplifying assumption that this mapping is many-to-one, that is, one or more custom dimension values may be mapped to the same standard dimension value. A map may contain one or more of these mappings (see ems:mapping), but each custom dimension value must map to exactly one standard dimension value.

Status: testing

Label: Map

Type: rdfs:Class

Is domain of:

Is range of:

See Also:

map

ems:map is an RDF property.

This property links a fact table head to an ems:Map resource that defines how custom dimension values are mapped to standard values. The scope of this mapping is local to the fact table.

Status: testing

Label: map

Type: rdf:Property

Has range:

Mapping

ems:Mapping is an RDF class.

This class describes a mapping. A mapping maps some custom string label value for a dimension (see ems:from) to a dimension member URI which may be a standard value defined in some vocabulary. (see ems:to).

Status: testing

Label: Mapping

Type: rdfs:Class

Is domain of:

Is range of:

See Also:

mapping

ems:mapping is an RDF property.

This property links a map to a mapping. A map may have one or more mappings.

Status: testing

Label: mapping

Type: rdf:Property

Has domain:

Has range:

Measure

ems:Measure is an RDF class.

A measure, as in the idiom take the measure of, is the result of observing some numerically quantifiable aspect of a project, system, or thing. For example, a duration of 12 months or a size of 10 KLOC are measures. The aspect being measured, e.g. duration or size, is referred to as the metric and is given by the property ems:metric. The scale of measurement, e.g. months or KLOC, is referred to as the unit of measure and is given by the property ems:unitOfMeasure. The numeric value of an observation, e.g. 12 or 10, is given by the property ems:numericValue.

Status: stable

Label: Measure

Type: rdfs:Class

Is domain of:

Is range of:

See Also:

MeasureCell

ems:MeasureCell is an RDF class.

This class descibes measure cells. A measure cell refers to a measure column (see ems:inColumn) and has a numeric value (see ems:numericValue.

Status: testing

Label: MeasureCell

Type: rdfs:Class

Is range of:

See Also:

measureCell

ems:measureCell is an RDF property.

This property links a fact row to one or more of its measure cells.

Status: testing

Label: measureCell

Type: rdf:Property

Has range:

MeasureColumn

ems:MeasureColumn is an RDF class.

This class describes a measure column of a fact table. A measure column has a metric (see ems:metric and a unit of measure (see ems:unitOfMeasure.

Status: testing

Label: MeasureColumn

Type: rdfs:Class

See Also:

measureColumn

ems:measureColumn is an RDF property.

This property links the head of a fact table to one or more ems:MeasureColumn resources that define measure columns. Every fact table MUST have at least one measure column.

Status: testing

Label: measureColumn

Type: rdf:Property

MeasureDistribution

ems:MeasureDistribution is an RDF class.

A measure distribution is like a measure (see ems:Measure) except that it gives a probability distribution for the numeric value of a measure instead of a precise numeric value. Measure distributions are used in scenario assumptions (see ems:assumes and ems:assumesTable) and estimate predications (see ems:predicts and ems:predictsTable).

Status: testing

Label: MeasureDistribution

Type: rdfs:Class

Is range of:

See Also:

MeasureDistributionCell

ems:MeasureDistributionCell is an RDF class.

A measure distribution cell is a cell in a fact distribution row. It refers to its column (see ems:inColumn) and contains a measure distribution (see ems:distribution).

Status: testing

Label: MeasureDistributionCell

Type: rdfs:Class

Is range of:

See Also:

measureDistributionCell

ems:measureDistributionCell is an RDF property.

This property links a fact distribution row to a measure distribution cell.

Status: testing

Label: measureDistributionCell

Type: rdf:Property

Has range:

Measurement

ems:Measurement is an RDF class.

A measurement is a set of observations of numerically quantifiable aspects of a project, system, or thing.

Status: testing

Label: Measurement

Type: rdfs:Class

Is range of:

See Also:

MeasurementList

ems:MeasurementList is an RDF class.

A measurement list is a container for measurement resources.

Status: testing

Label: MeasurementList

Type: rdfs:Class

Is domain of:

Is range of:

See Also:

measurementList

ems:measurementList is an RDF property.

This property links a service to its measurement list.

Status: testing

Label: measurementList

Type: rdf:Property

Has domain:

Has range:

memberBaseline

ems:memberBaseline is an RDF property.

This property links a baseline list to its member baselines.

Status: testing

Label: memberBaseline

Type: rdf:Property

Has domain:

Has range:

See Also:

memberEstimate

ems:memberEstimate is an RDF property.

This property links an estimate list to its member estimates.

Status: testing

Label: memberEstimate

Type: rdf:Property

See Also:

memberMeasurement

ems:memberMeasurement is an RDF property.

This property links a measurement list to its member measurements.

Status: testing

Label: memberMeasurement

Type: rdf:Property

Has domain:

Has range:

See Also:

memberProject

ems:memberProject is an RDF property.

This property links a project list to its member projects.

Status: testing

Label: memberProject

Type: rdf:Property

Has domain:

Has range:

memberScenario

ems:memberScenario is an RDF property.

This property links a scenario list to its member scenarios.

Status: testing

Label: memberScenario

Type: rdf:Property

Has domain:

Has range:

Metric

ems:Metric is an RDF class.

A metric is a procedure or algorithm for quantifying or measuring some aspect of a thing, system, event, etc. For example duration is a metric that measures the amount of time an activity takes.

Status: stable

Label: Metric

Type: rdfs:Class

Has subclass:

Is range of:

See Also:

metric

ems:metric is an RDF property.

This property links a measure to its metric. For example, the measure duration of 12 months has the metric duration.

Status: stable

Label: metric

Type: rdf:Property

Has range:

mostLikely

ems:mostLikely is an RDF property.

This property gives the most likely parameter value of a probability distribution.

Status: testing

Label: mostLikely

Type: rdf:Property

Has domain:

See Also:

mu

ems:mu is an RDF property.

This property gives the mu parameter value of a probability distribution.

Status: testing

Label: mu

Type: rdf:Property

Has domain:

See Also:

NormalDistribution

ems:NormalDistribution is an RDF class.

A normal distribution (also known as a Gaussian distribution is a probability distribution that naturally arises as the limit of many random factors. It is symmetric about its mean and has a certain scale. The mean is given by ems:mu. Its scale (also known as its standard deviation) is given by ems:scale.

Status: testing

Label: NormalDistribution

Type: rdfs:Class

Is subclass of:

See Also:

numberOfQuantiles

ems:numberOfQuantiles is an RDF property.

This property gives the number of quantiles parameter value of a probability distribution.

Status: testing

Label: numberOfQuantiles

Type: rdf:Property

Has domain:

numericValue

ems:numericValue is an RDF property.

This property gives the numeric value of a resource. For example, the numeric value of the measure duration of 12 months is 12. The datatype of this property is typically xsd:double.

Status: stable

Label: numericValue

Type: rdf:Property

observes

ems:observes is an RDF property.

This property links a measurement to the observed value of a measure. In an EMS service, the measurement is a resource of type ems:Measurement which may observe zero or more measures. For example, a measurement at the end of a project may observe a duration of 12 months and a cost of 200,000 USD.

Status: stable

Label: observes

Type: rdf:Property

Has range:

observesTable

ems:observesTable is an RDF property.

This property links a measurement to the observed fact table. The fact table analyzes the measurement along one or more dimensions.

Status: testing

Label: observesTable

Type: rdf:Property

Has range:

observesWbs

ems:observesWbs is an RDF property.

This property links a measurement to the observed work breakdown structure.

Status: testing

Label: observesWbs

Type: rdf:Property

Has range:

PointEstimate

ems:PointEstimate is an RDF class.

A point estimate is a probability distribution that is concentrated at a single value. The single value is given by ems:numericValue.

Status: testing

Label: PointEstimate

Type: rdfs:Class

Is subclass of:

See Also:

PoissonDistribution

ems:PoissonDistribution is an RDF class.

A Poisson distribution is a probability distribution that gives the probability that a given number of events will occur in a fixed time period. This distribution is completely specified by a single parameter often denoted by the Greek letter lambda. Lambda is given by ems:lambda.

Status: testing

Label: PoissonDistribution

Type: rdfs:Class

Is subclass of:

Is domain of:

See Also:

predicts

ems:predicts is an RDF property.

This property links an estimate to the predicted value for some measure, e.g. duration, size. The predicted value is a probability distribution.

Status: testing

Label: predicts

Type: rdf:Property

Has domain:

Has range:

predictsTable

ems:predictsTable is an RDF property.

This property links an estimate to the predicted value for some fact table of measures, e.g. staffing by week. The predicted fact table contains probability distributions.

Status: testing

Label: predictsTable

Type: rdf:Property

Has domain:

Has range:

predictsWbs

ems:predictsWbs is an RDF property.

This property links an estimate to the predicted work breakdown structure.

Status: testing

Label: predictsWbs

Type: rdf:Property

Has domain:

Has range:

probability

ems:probability is an RDF property.

This property gives the cumulative probability. For example, the cumulative probability of the third quartile is 75%.

Status: testing

Label: probability

Type: rdf:Property

See Also:

ProbabilityDistribution

ems:ProbabilityDistribution is an RDF class.

This class describes probability distributions. A probability distribution gives the likelihood that a measurement of some value (a random variable) will fall within some given range. Probability distributions are used in scenario assumptions (see ems:assumes) and estimate predictions (see ems:predicts).

Status: testing

Label: ProbabilityDistribution

Type: rdfs:Class

Has subclass:

Is domain of:

Is range of:

See Also:

ProcessMetric

ems:ProcessMetric is an RDF class.

A process metric is a metric that measures the process used to create an artifact such as software. For example, build (metric:Builds) and test executions (metric:TestExecutions) are process metrics.

Status: testing

Label: ProcessMetric

Type: rdfs:Class

Is subclass of:

See Also:

ProductivityMetric

ems:ProductivityMetric is an RDF class.

A productivity metric is a metric that measures the rate at which some artifact, such as software, is produced. For example, lines of code per unit time (metric:EslocPerTime) and team velocity (metric:TeamVelocity) are productivity metrics.

Status: testing

Label: ProductivityMetric

Type: rdfs:Class

Is subclass of:

See Also:

Project

ems:Project is an RDF class.

Within the scope of EMS, a project is any activity, system, or thing that can be the subject of a set of measurements. In practice, a project is often a time-bounded work effort that produces a unique result.

Status: testing

Label: Project

Type: rdfs:Class

Is domain of:

Is range of:

See Also:

project

ems:project is an RDF property.

The property links a resource to a project.

Status: testing

Label: project

Type: rdf:Property

Has range:

ProjectList

ems:ProjectList is an RDF class.

A project list is a container for projects.

Status: testing

Label: ProjectList

Type: rdfs:Class

Is domain of:

Is range of:

See Also:

projectList

ems:projectList is an RDF property.

This property links a service to its project list.

Status: testing

Label: projectList

Type: rdf:Property

Has domain:

Has range:

Quantile

ems:Quantile is an RDF class.

This class describes a quantile of a quantile function. The cumulative probability of a quantile is given by ems:probability. The cumulative probability MUST be greater than 0 and less than 1. The upper limit of the range of measurement values is given by ems:numericValue. The lower limit of the range of measurement values is given by the upper limit of the preceding quantiles.

The probability that a measurement gives a value less than or equal to the numeric value is equal to the cumulative probability.

Status: testing

Label: Quantile

Type: rdfs:Class

Is range of:

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quantile

ems:quantile is an RDF property.

This property links a quantile function resource to one or more quantiles.

Status: testing

Label: quantile

Type: rdf:Property

Has domain:

Has range:

QuantileFunction

ems:QuantileFunction is an RDF class.

A quantile function is a probability distribution that breaks up a range of values into quantiles that each have the same probability. When the number of quantiles is 4, 10, or 100, we refer to them as quartiles, deciles, and percentiles. For example, there is a 25% probability that a measurement will fall within any given quartile. The number of quantiles is given by ems:numberOfQuantiles. The number of quantiles MUST be greater than one.

The range of possible measurement values may be unbounded. If a lower bound exists, it is given by ems:low. If an upper bound exists, it is given by ems:high.

The graph of the quantile function is given by a set of measurement values that correspond to the equally spaced cumulative probabilities between 0 and 1. For example, for quartiles the cumulative probabilities are 25%, 50%, and 75%. The cumulative probability values are given by one or more ems:quantile properties.

Status: testing

Label: QuantileDistribution

Type: rdfs:Class

Is subclass of:

Is domain of:

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realProjectId

ems:realProjectId is an RDF property.

This property links a project to an identifier of the project as a real-world object.

Status: testing

Label: realProjectId

Type: rdf:Property

Has domain:

ReliabilityMetric

ems:ReliabilityMetric is an RDF class.

A reliability metric is a metric that measures the correctness or absence of failures in a system such as a software system. For example defects (metric:Defects), failures (metric:Failures), and mean time to failure (metric:MeanTimeToFailure) are reliability metrics.

Status: testing

Label: ReliabilityMetric

Type: rdfs:Class

Is subclass of:

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scale

ems:scale is an RDF property.

This property gives the scale parameter value of a probability distribution. This parameter is also known as the standard deviation and is often denoted by the Greek letter sigma.

Status: testing

Label: scale

Type: rdf:Property

Has domain:

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Scenario

ems:Scenario is an RDF class.

A scenario is a set of assumptions about how a project will be executed. These assumptions are used as inputs to estimates.

Status: testing

Label: Scenario

Type: rdfs:Class

Is domain of:

Is range of:

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scenario

ems:scenario is an RDF property.

The property links a resource to a scenario.

Status: testing

Label: scenario

Type: rdf:Property

Has range:

ScenarioList

ems:ScenarioList is an RDF class.

A scenario list is a container for scenario resources.

Status: testing

Label: ScenarioList

Type: rdfs:Class

Is domain of:

Is range of:

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scenarioList

ems:scenarioList is an RDF property.

This property links a service to its scenario list.

Status: testing

Label: scenarioList

Type: rdf:Property

Has domain:

Has range:

seeAlsoEstimation

ems:seeAlsoEstimation is an RDF property.

This property links a project to a corresponding resource in an estimation application.

Status: testing

Label: seeAlsoEstimation

Type: rdf:Property

Has domain:

seeAlsoPerformance

ems:seeAlsoPerformance is an RDF property.

This property links a project to a corresponding resource in a performance management application.

Status: testing

Label: seeAlsoPerformance

Type: rdf:Property

Has domain:

seeAlsoPortfolio

ems:seeAlsoPortfolio is an RDF property.

This property links a project to a corresponding resource in a portfolio management application.

Status: testing

Label: seeAlsoPortfolio

Type: rdf:Property

Has domain:

seeAlsoProject

ems:seeAlsoProject is an RDF property.

This property links a project to a corresponding resource in a project management application.

Status: testing

Label: seeAlsoProject

Type: rdf:Property

Has domain:

Service

ems:Service is an RDF class.

An EMS service hosts and manages a set of resources that describe projects, scenarios, estimates, measurements, and baselines. Each instance of an service has a set of resource containers that contain resources of a given type.

Status: testing

Label: Service

Type: rdfs:Class

Is domain of:

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service

ems:service is an RDF property.

This property is used to link a resource to the EMS service instance that hosts it.

Status: testing

Label: service

Type: rdf:Property

Has range:

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SizeMetric

ems:SizeMetric is an RDF class.

A size metric is a metric that measures the magnitude, volume, bulk, or capability of some artifact such as software. For example, lines of code (metric:Sloc) and story points (metric:StoryPoints) are size metrics.

Status: testing

Label: SizeMetric

Type: rdfs:Class

Is subclass of:

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tableSource

ems:tableSource is an RDF property.

Fact tables contain actual measurements for projects, systems, or things. In practice, there may be many measurements and they may be updated frequently. The measurements may be at a finer level of granularity than the estimates, e.g. a project may estimate total defects found per month, whereas the actual number found may be collected daily. Furthermore, these measurements are often collected automatically by software development tools such as bug tracking systems or source code control systems. It may therefore be useful to simply refer to the source of the measurements rather than copy the actual measurements into the EMS service provider, e.g. a dynamic query on a software tool may generate the fact table on demand.

This property lets you refer to the remote source of the fact table data via a URL. An HTTP GET request on this URL MUST return an ems:FactTable resource whose dcterms:title and ems:head properties match this resource.

Status: testing

Label: tableSource

Type: rdf:Property

Has range:

TimeMetric

ems:TimeMetric is an RDF class.

A time metric is a metric that describes some temporal aspect of a project, system, or thing. For example, duration (metric:Duration), start (metric:Start), and finish (metric:Finish) are time metrics.

Status: testing

Label: TimeMetric

Type: rdfs:Class

Is subclass of:

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to

ems:to is an RDF property.

This property links a mapping to its dimension member URI. Many mappings MAY map to the same dimension member URI.

Status: testing

Label: to

Type: rdf:Property

Has domain:

Has range:

TriangularDistribution

ems:TriangularDistribution is an RDF class.

A triangular distribution is a probability distribution that concentrated between high and low values, and that linearly rises to and falls from to an intermediate most likely value. The low value is given by ems:low. The most likely value is given by ems:mostLikely. The high value is given by ems:high.

Status: testing

Label: TriangularDistribution

Type: rdfs:Class

Is subclass of:

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UniformDistribution

ems:UniformDistribution is an RDF class.

A uniform distribution is a probability distribution that is evenly spread between a high and a low value. The high value is given by ems:high. The low value is given by ems:low.

Status: testing

Label: UniformDistribution

Type: rdfs:Class

Is subclass of:

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UnitOfMeasure

ems:UnitOfMeasure is an RDF class.

A unit of measure specifies a procedure for associating a numeric value with some metric. For example, month (unit:Month) is a unit of measure for duration (metric:Duration).

Status: testing

Label: UnitOfMeasure

Type: rdfs:Class

Is range of:

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unitOfMeasure

ems:unitOfMeasure is an RDF property.

This property gives the unit of measure. For example, the measure duration of 12 months has a unit of measure months.

Status: stable

Label: unitOfMeasure

Type: rdf:Property

Has domain:

Has range:

useMap

ems:useMap is an RDF property.

This property links a resource to a map.

Status: testing

Label: useMap

Type: rdf:Property

Has range:

wbsContent

ems:wbsContent is an RDF property.

This property gives the literal XML WBS content of a WBS resource. This content MUST be in the XML format specified by the WBS resource. If this property is absent, then ems:wbsSource MUST be present. If this property and ems:wbsSource are present, then the value of this property SHOULD be the XML document representation returned in the HTTP GET response for the link given in ems:wbsSource.

Status: testing

Label: wbsContent

Type: rdf:Property

Has domain:

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WbsFormat

ems:WbsFormat is an RDF class.

A WBS format is a format that specifies the syntax of work breakdown structures. For example, http://schemas.microsoft.com/project/2007 is the format for Microsoft Office Project 2007 XML Data Interchange Schema.

Status: testing

Label: WbsFormat

Type: rdfs:Class

Is subclass of:

Is range of:

wbsFormat

ems:wbsFormat is an RDF property.

This property links a WBS resource to the XML format of its content. EMS does not define a format for WBS content. Instead, this property identifies the specification that defines the XML format of the WBS content.

Status: testing

Label: wbsFormat

Type: rdf:Property

Has domain:

Has range:

wbsSource

ems:wbsSource is an RDF property.

This property links a WBS resource to a resource that contains the WBS XML content. This content MUST be in the XML format specified by the WBS resource. When this link is deferenced using an HTTP GET request, the response MUST be the WBS. If this property is absent, then the WBS resource MUST have a ems:wbsContent property.

Status: testing

Label: wbsSource

Type: rdf:Property

Has domain:

WorkBreakdownStructure

ems:WorkBreakdownStructure is an RDF class.

This class describes work breakdown structures. A work breakdown structure (WBS) is a common way to represent the work to be performed in a project. In EMS, a WBS may be used as an assumption in an scenario, as a prediction in an estimate, or as an observation in a measurement.

A WBS has a format (see ems:wbsFormat), and may either include (see ems:wbsContent) or link to (see ems:wbsSource) its content. The included or linked WBS content MUST be in the specified format.

Status: testing

Label: WorkBreakdownStructure

Type: rdfs:Class

Is domain of:

Is range of:

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