eml package

Package for reading and writing Ecological Metadata Language.

EML Class

class eml.base.eml.EML(package_id: str, system: str, resource_type: EMLResource, version: EMLVersion = EMLVersion.VERSION_2_2_0, language: Language = Language.ENG, access: AccessType = None, additional_metadata: List[EMLAdditionalMetadata] = None, annotation: List[Tuple[SemanticAnnotation, str]] = None)

Bases: EMLObject

Class representing an Ecological Metadata Language

Parameters:

package_idstr

A globally unique identifier for the data package described by this EML that can be used to cite it elsewhere.

systemstr

The data management system within which an identifier is in scope and therefore unique.

resource_typeEMLResource

Type of the resource: dataset, citation, protocol or software.

version: EMLVersion, optional

Version of the EML standard. Default: latest (2.2.0).

languageLanguage, optional

Language abbreviation to be used, defaults to “eng”

accessAccessType, optional

Access control rules for the entire resource, which can be overridden by access rules in distribution trees.

additional_metadataList[EMLAdditionalMetadata], optional

A flexible field for including any other relevant metadata that pertains to the resource being described.

annotation: List[Tuple[SemanticAnnotation, str]], optional

A list of precisely-defined semantic statements about this resource.

Attributes:

access

None: Access control rules for the entire resource.

additional_metadata

List[EMLAdditionalMetadata]: A flexible field for including any other relevant metadata.

annotations

Annotation: A list of precisely-defined semantic statements about this resource.

id

str: Unique identifier of the resource

language

Language: The language of the resource.

package_id

str: A globally unique identifier for the data package described by this EML that can be used to cite it.

references

bool: Whether the resource is referencing another or is being defined

referencing

bool: Whether the resource is referencing another or is being defined

resource

Resource: The resource instance.

resource_type

EMLResource: The type of the resource.

scope

Scope: The scope of the identifier.

system

str: The data management system within which an identifier is in scope and therefore unique.

Methods

Annotation(semantic_annotation, references)	A precisely-defined semantic statement about an element in the EML document.
add_additional_info(additional_info)	Add additional info to the resource in the EML.
add_additional_metadata(additional_metadata)	Add additional metadata to the resource in the EML.
add_alternative_identifier(...)	Add an alternative identifier to the EML.
add_annotation(annotation)	Add annotation to the resource in the EML.
add_associated_party(associated_party, role)	Add metadata provider to the EML.
add_creator(creator)	Add a new creator to the EML.
add_distribution(distribution)	Add distribution to the resource in the EML.
add_keyword_set(keyword_set)	Add keyword set to the resource in the EML.
add_licensed(licensed)	Add licensed to the resource in the EML.
add_metadata_provider(metadata_provider)	Add metadata provider to the EML.
add_namespace(prefix, uri)	Add a namespace to the XML object.
add_title(title[, language])	Add a new title to the EML.
check_principal_tag(tag, nmap)	Checks if the tag is the Principal tag of the object.
from_string(text)	Generates XML Object from a string of an XML file.
from_xml(file[, encoding])	Generates an XML Object from an XML file.
generate_references_element()	Generate the <references> element.
get_no_referrer(element, nmap)	Generate an EML instance object using an XML element.
get_principal_tag()	Returns the principal tag with namespaces if it is present.
get_referrer(element, nmap)	EML cannot have references.
get_scope(element)	Get the scope from the element.
initialize_resource(titles, creators, **kwargs)	Initialize the resource instance of this EML.
object_to_element(tag[, prefix])	Generates an element using tag, adding namespace tag.
parse(element, nmap)	Common parse of an EML object
set_abstract(abstract)	Set abstract of the resource in the EML.
set_coverage(coverage)	Set coverage of the resource in the EML.
set_intellectual_rights(intellectual_rights)	Set intellectual rights of the resource in the EML.
set_language(language)	Set language of the resource in the EML.
set_pub_date(date)	Set publication date of the resource in the EML.
set_series(series)	Set series of the resource in the EML.
set_short_name(short_name)	Set short name of Resource in the EML.
to_element()	Generate an XML element instance using the EML information.
to_xml()	Generates text of an XML file.

class Annotation(semantic_annotation: SemanticAnnotation, references: str)

Bases: object

A precisely-defined semantic statement about an element in the EML document.

Parameters:

semantic_annotation: SemanticAnnotation

A semantically-precise statement about an EML element.

referencesstr

The id of the element being annotated.

Attributes:

annotation

SemanticAnnotation: A semantically-precise statement about an EML element.

references

str: The id of the element being annotated.

property annotation: SemanticAnnotation

SemanticAnnotation: A semantically-precise statement about an EML element.

property references: str

str: The id of the element being annotated.

NAMESPACE_TAG = 'eml'

str: Namespace tag eml, to be replace for {uri}tag

PRINCIPAL_TAG = 'eml'

str : The principal tag of the XML document.

property access: AccessType

None: Access control rules for the entire resource.

add_additional_info(additional_info: EMLTextType) → None

Add additional info to the resource in the EML.

Parameters:

additional_infoEMLTextType

Additional info in the required eml.types.text_type.EMLTextType instance format.

add_additional_metadata(additional_metadata: EMLAdditionalMetadata) → None

Add additional metadata to the resource in the EML.

Parameters:

additional_metadataEMLAdditionalMetadata

A flexible field for including any other relevant metadata.

add_alternative_identifier(alternative_identifier: str | ExtensionString) → None

Add an alternative identifier to the EML.

Parameters:

alternative_identifierstr | ExtensionString

An alternative identifier.

add_annotation(annotation: SemanticAnnotation) → None

Add annotation to the resource in the EML.

Parameters:

annotationSemanticAnnotation

An annotation in the eml.types.semantic_annotation.SemanticAnnotation instance format.

add_associated_party(associated_party: ResponsibleParty, role: Role) → None

Add metadata provider to the EML.

Parameters:

associated_partyResponsibleParty

An Associated Party of the resource in the EML.

roleRole

The role of the Associated Party.

add_creator(creator: ResponsibleParty) → None

Add a new creator to the EML.

Parameters:

creatorResponsibleParty

The creator to be added to the resource.

add_distribution(distribution: EMLDistribution) → None

Add distribution to the resource in the EML.

Parameters:

distributionEMLDistribution

An instance of eml.resources.distribution.distribution.EMLDistribution.

add_keyword_set(keyword_set: EMLKeywordSet) → None

Add keyword set to the resource in the EML.

Parameters:

keyword_setEMLKeywordSet

An instance of eml.resources.keyword_set.EMLKeywordSet.

add_licensed(licensed: EMLLicense) → None

Add licensed to the resource in the EML.

Parameters:

licensedEMLLicense

An license instance.

add_metadata_provider(metadata_provider: ResponsibleParty) → None

Add metadata provider to the EML.

Parameters:

metadata_providerResponsibleParty

A Metadata Provider of the resource in the EML.

add_title(title: str | I18nString, language: Language = Language.ENG) → None

Add a new title to the EML.

Parameters:

titlestr | I18nString

The title as string or with language already

languageLanguage, optional

The language of the title. If the title given is a I18nString, this argument is discarded.

property additional_metadata: List[EMLAdditionalMetadata]

List[EMLAdditionalMetadata]: A flexible field for including any other relevant metadata.

property annotations: List[Annotation]

Annotation: A list of precisely-defined semantic statements about this resource.

classmethod get_no_referrer(element: Element, nmap: Dict) → EML

Generate an EML instance object using an XML element.

Parameters:

elementlxml.etree.Element

XML element to parse.

nmapDict

Namespace.

Returns:

EML

EML instance.

classmethod get_referrer(element: Element, nmap: Dict) → EMLObject

EML cannot have references.

Parameters:

elementlxml.etree.Element

An XML element instance.

nmapDict

Namespace.

Raises:

ValueError

EML cannot reference another EML.

initialize_resource(titles: str | I18nString | List[str | I18nString], creators: ResponsibleParty | List[ResponsibleParty], **kwargs) → None

Initialize the resource instance of this EML.

Parameters:

titlesstr | I18nString | List[str | I18nString]

The titles to initialize the resource with.

creatorsResponsibleParty | List[ResponsibleParty]+

The creators to initialize the resource with.

Other Parameters:

**kwargsParameters given in eml.resources.resource.Resource or any subclass.

property language: Language

Language: The language of the resource.

property package_id: str

str: A globally unique identifier for the data package described by this EML that can be used to cite it.

property resource: Resource

Resource: The resource instance.

property resource_type: EMLResource

EMLResource: The type of the resource.

property scope: Scope

Scope: The scope of the identifier.

set_abstract(abstract: EMLTextType) → None

Set abstract of the resource in the EML.

Parameters:

abstractEMLTextType

An abstract in the required eml.types.text_type.EMLTextType instance format.

set_coverage(coverage: EMLCoverage) → None

Set coverage of the resource in the EML.

Parameters:

coverageEMLCoverage

An instance of eml.resources.coverage.coverage.EMLCoverage.

set_intellectual_rights(intellectual_rights: EMLTextType) → None

Set intellectual rights of the resource in the EML.

Parameters:

intellectual_rightsEMLTextType

The intellectual rights in the required eml.types.text_type.EMLTextType instance format.

set_language(language: Language) → None

Set language of the resource in the EML.

Parameters:

languageLanguage

A Language enum instance.

set_pub_date(date: date) → None

Set publication date of the resource in the EML.

Parameters:

datedatetime.date

Publication date.

set_series(series: str) → None

Set series of the resource in the EML.

Parameters:

seriesstr

The series from which the resource came.

set_short_name(short_name: str) → None

Set short name of Resource in the EML.

Parameters:

short_namestr

A short name for the resource.

property system: str

str: The data management system within which an identifier is in scope and therefore unique.

to_element() → Element

Generate an XML element instance using the EML information.

Returns:

lxml.etree.Element

XML element instance.

EMLVersion Class

class eml.base.version.EMLVersion(value)

Bases: Enum

Version of the specification of the EML used.

LATEST = (2, 2, 0)

VERSION_2_1_1 = (2, 1, 1)

VERSION_2_2_0 = (2, 2, 0)

get_namespace() → Dict[Any, str]

Get namespace of the given version.

Returns:

Dict[Any, str]

Namespace as a dictionary of value:uri.

classmethod get_version(schema_location: str) → EMLVersion

Get version of EML parsing the schema location provided.

Parameters:

schema_locationstr

Schema location text.

Returns:

EMLVersion

Version of the EML.

schema_location() → List[str]

The schema location of the given version.

Returns:

List[str]

A list of url where the schema of the XML version is located.

Raises:

NotImplementedError

Version not implemented or not existing.

EMLObject Base Class

class eml.types.eml_object.EMLObject(_id: str = None, scope: Scope = Scope.DOCUMENT, system: str = None, referencing: bool = False, references_system: str = None)

Bases: XMLObject, ABC

Abstract class representing most of the EML document

Parameters:

_idstr, optional

Unique identifier within the scope.

scopeScope, default DOCUMENT

The scope of the identifier.

systemstr, optional

The data management system within which an identifier is in scope and therefore unique.

referencingbool, optional, default=False

Whether the resource is referencing another or is being defined.

references_systemstr, optional

System attribute of reference.

Attributes:

NAMESPACE_TAG

id

str: Unique identifier of the resource

references

bool: Whether the resource is referencing another or is being defined

referencing

bool: Whether the resource is referencing another or is being defined

scope

Scope: The scope of the identifier.

system

str: The data management system within which an identifier is in scope and therefore unique.

Methods

add_namespace(prefix, uri)	Add a namespace to the XML object.
check_principal_tag(tag, nmap)	Checks if the tag is the Principal tag of the object.
from_string(text)	Generates XML Object from a string of an XML file.
from_xml(file[, encoding])	Generates an XML Object from an XML file.
generate_references_element()	Generate the <references> element.
get_no_referrer(element, nmap)	Generate an EML Object that do not reference another.
get_principal_tag()	Returns the principal tag with namespaces if it is present.
get_referrer(element, nmap)	Generate an EML Object referencing another EML Object.
get_scope(element)	Get the scope from the element.
object_to_element(tag[, prefix])	Generates an element using tag, adding namespace tag.
parse(element, nmap)	Common parse of an EML object
to_element()	Generates a lxml.tree.Element from the object.
to_xml()	Generates text of an XML file.

generate_references_element() → Element

Generate the <references> element.

Returns:

xml.etree.Element

XML Element representing the references of referrer resource.

abstractmethod classmethod get_no_referrer(element: Element, nmap: Dict) → EMLObject

Generate an EML Object that do not reference another.

Parameters:

elementlxml.etree.Element

XML element to parse.

nmapDict

Namespace.

Returns:

EMLObject

Object parsed.

abstractmethod classmethod get_referrer(element: Element, nmap: Dict) → EMLObject

Generate an EML Object referencing another EML Object.

Parameters:

elementlxml.etree.Element

XML element to parse with references object.

nmapDict

Namespace.

Returns:

EMLObject

Object parsed that reference another.

static get_scope(element: Element) → Scope

Get the scope from the element.

Parameters:

elementlxml.etree.Element

XML Element to find scope.

Returns:

Scope

A valid Scope.

Raises:

ValueError

Not a valid scope string.

property id: str

str: Unique identifier of the resource

classmethod parse(element: Element, nmap: Dict) → EMLObject | None

Common parse of an EML object

Parameters:

elementlxml.etree.Element

XML Element to parse

nmapDict

Namespace

Returns:

EMLObject

Parsed EML Object

property references: ExtensionString

bool: Whether the resource is referencing another or is being defined

property referencing: bool

bool: Whether the resource is referencing another or is being defined

property scope: Scope

Scope: The scope of the identifier.

property system: str

str: The data management system within which an identifier is in scope and therefore unique.

class eml.types.eml_object.Scope(value)

Bases: Enum

DOCUMENT = 0

SYSTEM = 1

Subpackages

• eml.types package
  • Classes with no predefine Principal Tag
    • _NoTagObject Base Class
      • _NoTagObject
    • Extension String Class
      • ExtensionString
    • Extension URI Class
      • ExtensionURI
    • i18n String Class
      • I18nString
    • TextType Class
      • EMLTextType
    • Responsible Party Class
      • ResponsibleParty
      • Role
    • Semantic Annotation Class
      • SemanticAnnotation
    • Research Project Class
      • ResearchProject
    • Access Classes
      • AccessOrder
      • AccessPermission
      • AccessRole
      • AccessType
    • Procedure Step Class
      • ProcedureStep
  • Classes with predefine Principal Tag
    • Section Class
      • EMLSection
    • Individual Name Class
      • IndividualName
    • Organization Name Class
    • Position Name Class
    • Address Class
      • EMLAddress
    • Phone Class
      • EMLPhone
    • Section Class
      • EMLSection
    • Maintenance Class
      • MaintUpFreqType
      • Maintenance
    • Change History Class
      • ChangeHistory
    • Methods Class
      • Methods
• eml.resources package
  • Resources
    • Resource Type
      • EMLResource
    • Resource Base Class
      • Resource
    • Citation Resource
      • EMLCitation
    • Dataset Resource
      • EMLDataset
    • Protocol Resource
      • EMLProtocol
    • Software Resource
      • EMLSoftware
  • Resource Group
    • KeywordSet Class
      • EMLKeywordSet
      • KeywordType
    • License Class
      • EMLLicense
    • Distribution Class
      • EMLDistribution
      • Distribution accessory classes
    • Coverage Class
      • EMLCoverage
      • Coverage accessory classes