MaterialSample

What is a MaterialSample?

A MaterialSample is a physical, tangible Sample.

Realizations

Data model	Concept name	Definition
OGC OMS	MaterialSample	A MaterialSample is a physical, tangible Sample.
IFC	MaterialSample	Same as OGC OMS
AGS	SAMP	SAMP includes information for both the sample and the sampling activity
DIGGS	Sample	A material sample, either solid, fluid, or gas that is obtained as a result of a sampling activity, for the purpose of observation and/or testing. This is a concrete representation of AbstractSample, which serves as the head of a substitution group for this and other sample specialties.
DIGGS	TrialGroutBatch	A specialization of Sample that also contains properties describing the characteristics of a batch of grout developed for testing to determine a grout design mix.
DIGGS	GroutBatch	A specialization of Sample that contains properties describing the characteristics of a batch of grout used for production purposes. This object must reference a DesignGroutMix object defined within the GroutingProgram feature.
DIGGS	AbstractSpecimen	AbstractSpecimen serves as the head of a substitution group for specimen specializations based on state or type: eg. soil, liquid, gas, rock. A specimen derives from one or more samples, is created as part of a test procedure, and exists only in the context of the test procedure that creates it.
DIGGS	GroutSpecimen	A specialization of a specimen that describes the physical conditions of a grout or concrete sample subjected to testing.
DIGGS	FluidSpecimen	A specialization of a specimen that describes the physical conditions of a fluid sample or samples subjected to testing.
DIGGS	RockSpecimen	A specialization of a specimen that describes the physical conditions of a rock sample or samples subjected to testing.
DIGGS	SoilSpecimen	A specialization of a specimen that describes the physical conditions of a soil sample or samples subjected to testing.

Properties

PropertyName	Definition
intermalIdentifier	The value of this property is the identifier originally created by the authority for this feature, or that is used as the identifier in the authority's internal data management system. There is no assumption as to the unique scope or persistence of this identifier. In cases where the original or internal identifier does not meet the semantic requirements or gml:id or gml:identifier, the internal identifier may be included in this property in order for the originating authority to "map back" the identifier to an internal data management system. The codeSpace attribute must be populated to identify the authority that uses the internalIdentifier value.
chainOfCustodyEvent	Contains information on the chain-of-custody for the sample
relatedSample	Another Sample the context Sample is related to
purpose
status	A text string to provide information about the status of the object to be used to track QA/QC controls, review or release status, etc. The values used are intended to come from a controlled list of terms maintained by an organization.
role	Identifies a specific role or task performed that is associated with this specific feature, the person ororganization that performed the role, and associated time frame, if applicable.
classification	A definition of the class of sample collected or produced, such as soil, rock, fluid, etc.)
sampleType	Type of sample. Shall refer to a codelist.
size	The size describes a physical extent of the MaterialSample.
sampleWeight	Weight of the sample following collection or production and prior to any subsampling or specimen preparation
sampleVolume	Volume of the sample following collection or production and prior to any subsampling or specimen preparation
sampleDimensions	For solid soil or rock samples, contains properties of the sample dimensions
samplingActivityRef	A reference to a sampling activity that is associated with this feature.
sampledFeatureRef	A reference to the sampled object (if any).
metadata	Identifies external files associated with this feature. This allows for the feature to be further elaborated with information that cannot be represented by ASCII text, such as a photograph or other media, binary data, or a formatted report.
extrusionMethod	Method by which the sample is removed from its sampler.
sourceLocation	The sourceLocation is the location from where the MaterialSample was obtained.
sampler	a device or entity (including humans) that is used by, or implements, a SamplingProcedure to create or transform one or more Sample(s).
SampleDepthRange	Top and bottom depths where a sample was retrieved

FAQ

What about Specimen?

In geotechnics, a distinction may appear between the MaterialSample collected on the field and another MaterialSample made from it by sub-sampling. The first one is often called Sample, while the second(s) is/are often called Specimen(s).

Here in this conceptual model, the term MaterialSample is generic and can be used for both. Attributes can be used to explain the lineage between two (or more) MaterialSample.

Standards like DIGGS yet propose an explicit terminology.

What about Sampling?

The sampling activity can be described with https://github.com/opengeospatial/Geotech/wiki/Sampling

GitHub issue

https://github.com/opengeospatial/Geotech/issues/11