entities & attributes overview by the end of this section participants will be able to discuss...

Entities & Attributes Overview

By the end of this section participants will be able to discuss the main components of Section 5, and be able to incorporate section 5 into the practice record at the end of the Workshop.

Metadata describes • Metadata is information about data• Metadata describes the characteristics of

the data– How it was produced– Data Sources– The currentness of the data– The spatial parameters of the data set– Accuracy of the lines– Plus much more

Section 5 is the component of metadata which describes the data table.

Environmental Sensitivity Index Data

RARNUM - unique combination of species, concentration, and seasonality

CONC (concentration) = Density species is found at location

Season_ID = seasonality code like to the seasonal table

Element - Biology group

Metadata

Entity and Attribute Section

Detailed_Description: Entity_Type:

Entity_Type_Label: Population Entity_Type_Definition: U.S. Population in 1,000 aggregated by census geography and year. Entity_Type_Definition_Source: NOS, Special Projects

Attribute: Attribute_Label: c_popul Attribute_Definition: Total Population (Units: persons) Attribute_Definition_Source: NOS, Special Projects Attribute_Domain_Values:

Unrepresentable_Domain: Variable by location and year

Attribute: Attribute_Label: c_urbn Attribute_Definition: Urban Population (Units: persons) Attribute_Definition_Source: NOS, Special Projects Attribute_Domain_Values:

Unrepresentable_Domain: Variable by location and year

Overview Description

Dataset covers the following general areas, population, age, structures, income distributions, employment, educational attainment, and residential mobility aggregated by geographic area.

http://stics.noaa.gov

Detailed DescriptionDetailed_Description:

Entity_Type: Entity_Type_Label: Population Entity_Type_Definition: U.S. Population in 1,000s aggregated by census geography and year. Entity_Type_Definition_Source: NOS, Special Projects

Attribute: Attribute_Label: c_popul Attribute_Definition: Total Population (Units: persons) Attribute_Definition_Source: NOS, Special Projects Attribute_Domain_Values:

Unrepresentable_Domain: Variable by location and year

Attribute: Attribute_Label: c_urbn Attribute_Definition: Urban Population (Units: persons) Attribute_Definition_Source: NOS, Special Projects Attribute_Domain_Values:

Unrepresentable_Domain: Variable by location and year

Definitions• Entity - the definition and description of

a set into which similar entity instances are classified.

• Attribute - a defined characteristic of an entity.

Deciding the Entities and Attributes

Entity Road TableAttribute Road Location Road Type Length

Road FIPS Code Road Type LengthAnderson Trail 11 1 1McTale Path 12 1 0.5Tally Drive 11 3 2Sundale Route 13 2 3

Breakdown

Deciding the Entities and Attributes

Road FIPS Code Road Type LengthAnderson Trail 11 1 1McTale Path 12 1 0.5Tally Drive 11 3 2Sundale Route 13 2 3

Entity Road Location Road Type Length Attribute of Road Type 1 2 3

Breakdown

Entity Type

Entity Type Label: c_popul

Entity Type Definition: Total Population (Units:

persons)

Entity Type Definition Source: NOAA

Required Fields

Attribute

Attribute Label: c_popul

Attribute Definition: Total Population (Units:

persons)

Attribute Definition Source: NOAA

Attribute Domain Values:

Range Domain:

Range Domain Minimum: 1000

Range Domain Maximum: 300000

Required Fields

Enumerated Domain – A fixed list of values

Road FIPS Code Road Type LengthAnderson Trail 11 1 1McTale Path 12 1 0.5Tally Drive 11 3 2Sundale Route 13 2 3

Attribute Domain Value: Enumerated Domain: Enumerated Domain Value: 1 Enumerated Domain Value Definition: Bike Trail Enumerated Domain Value Definition Source: Test Company

Codeset Domain – Standardized List of Values

Attribute Domain Value: Codeset Name: Federal Information Processing Standards Codes Codeset Source: National Institute of Standards and Technology

Road FIPS Code Road Type LengthAnderson Trail 11 1 1McTale Path 12 1 0.5Tally Drive 11 3 2Sundale Route 13 2 3

Range Domain – A series of measurements where you would provide the minimum and maximum values

Road FIPS Code Road Type LengthAnderson Trail 11 1 1McTale Path 12 1 0.5Tally Drive 11 3 2Sundale Route 13 2 3

Attribute Domain Value: Range Domain: Range Domain Minimum: 0.5 Range Domain Maximum: 3

Unrepresentable Domain – Unique values such as names which cannot be easily summarized

Attribute Domain Value: Unrepresentable Name: Unique Values, Road Names

Road FIPS Code Road Type LengthAnderson Trail 11 1 1McTale Path 12 1 0.5Tally Drive 11 3 2Sundale Route 13 2 3

Additional Things to Think About - Definitions

Entity Type Entity Type Label: YEAR Entity Type Definition: year Entity Type Definition Source: NOAA

Entity Type Entity Type Label: YEAR Entity Type Definition: Fiscal year Entity Type Definition Source: NOAA

Additional Things to Think About - Units

Attribute Attribute Label: Depth Attribute Definition: Water Depth Attribute Definition Source: NOAA Attribute Domain Values: Range Domain:

Range Domain Minimum: 0.5 Range Domain Maximum: 3

Additional Things to Think About - Completeness

Attribute Attribute Label: 2013 Attribute Definition: S Attribute Definition Source: NOAA Attribute Domain Values: Unrepresentable Domain: Fixed Value

Additional Things to Think About - Labels

Attribute Attribute Label: Anthrax Attribute Definition: Anthracene Attribute Definition Source: NOAA Attribute Domain Values: Unrepresentable Domain: Fixed Value

Finally...

Remember, dataset definitions are an

important part of ensuring long-term

data integrity.

Provide complete definitions that are

understood by others outside of the

project and when appropriate the units

of measure.

• Have someone else read it.

• If you’re the only reviewer, put it away and read it again later.

• Check for clarity and omissions.

Review your final product.

Writing Metadata

• Does the documentation present all the information needed to use or reuse the data?

• Are any pieces missing?

When you review your work, ask:

Writing Metadata

5. Entity_and_Attribute_Information: (p. 75)

Database design

• entities, attributes, domains, description of data values