The GEDCOM X XML Serialization Format

March 25, 2020 · View on GitHub

Status

This document specifies an XML media type for the GEDCOM X Conceptual Model, and requests discussion and suggestions for improvements.

The current state of this document is as a "stable draft", and as such, the document may be subject to limited changes, BUT NOT backwards-incompatible changes, according to the discussion and suggestions for improvement.

Copyright Notice

License

This document is distributed under a Creative Commons Attribution-ShareAlike license. For details, see:

http://creativecommons.org/licenses/by-sa/3.0/

Summary

The GEDCOM X XML Serialization Format spec specifies how to represent the GEDCOM X Conceptual Model in XML. The spec includes examples, notational conventions, top-level data types, component-level data types, XML-specific data types, the GEDCOM X element, extensibility, and fragment identifiers.

1. Introduction

The GEDCOM X Conceptual Model is a specification of formal concepts and types that are used to provide a standard model and vocabulary for describing genealogical data.

The GEDCOM X XML Serialization Format is a specification that defines the media type used to serialize and deserialize the GEDCOM X Conceptual Model to and from XML.

1. Introduction
2. Top-Level Data Types
3. Component-Level Data Types
4. XML-Specific Data Types
5. The GEDCOM X Element
- 5.1 GEDCOM X Element QName
- 5.2 GEDCOM X Element Data Type
6. Extensibility
- 6.1 Data Type Extensions
- 6.2 Known XML Element Extensions
7. Fragment Identifiers

1.1 Identifier, Version, and Dependencies

The identifier for this specification is:

http://gedcomx.org/xml/v1

For convenience, the GEDCOM X XML Format may be referred to as "GEDCOM X XML 1.0".

The media type defined by this specification is:

application/x-gedcomx-v1+xml

This specification depends on the GEDCOM X Conceptual Model specification identified by http://gedcomx.org/conceptual-model/v1.

1.2 Examples

The following example shows an instance of a GEDCOM X serialization in accordance with this specification:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<gedcomx xmlns="http://gedcomx.org/v1/">
    <attribution>
        <contributor resource="#GGG-GGGG"/>
    </attribution>
    <person id="BBB-BBBB">
        <source description="#EEE-EEEE"/>
        <gender type="http://gedcomx.org/Male"/>
        <name id="789">
            <nameForm>
                <fullText>George Washington</fullText>
                <part type="http://gedcomx.org/Given" value="George"/>
                <part type="http://gedcomx.org/Surname" value="Washington"/>
            </nameForm>
        </name>
        <fact type="http://gedcomx.org/Birth" id="123">
            <date>
                <original>February 22, 1732</original>
                <formal>+1732-02-22</formal>
            </date>
            <place description="#888">
                <original>pope's creek, westmoreland, virginia, united states</original>
            </place>
        </fact>
        <fact type="http://gedcomx.org/Death" id="456">
            <date>
                <original>December 14, 1799</original>
                <formal>+1799-12-14T22:00:00</formal>
            </date>
            <place description="#999">
                <original>mount vernon, fairfax county, virginia, united states</original>
            </place>
        </fact>
    </person>
    <person id="CCC-CCCC">
        <source description="#FFF-FFFF"/>
        <gender type="http://gedcomx.org/Male"/>
        <name id="987">
            <nameForm>
                <fullText>Martha Dandridge Custis</fullText>
                <part type="http://gedcomx.org/Given" value="Martha Dandridge"/>
                <part type="http://gedcomx.org/Surname" value="Custis"/>
            </nameForm>
        </name>
        <fact type="http://gedcomx.org/Birth" id="321">
            <date>
                <original>June 2, 1731</original>
                <formal>+1731-06-02</formal>
            </date>
            <place description="#KKK">
                <original>chestnut grove, new kent, virginia, united states</original>
            </place>
        </fact>
        <fact type="http://gedcomx.org/Death" id="654">
            <date>
                <original>May 22, 1802</original>
                <formal>+1802-05-22</formal>
            </date>
            <place description="#999">
                <original>mount vernon, fairfax county, virginia, united states</original>
            </place>
        </fact>
    </person>
    <relationship id="DDD-DDDD">
        <source description="#FFF-FFFF"/>
        <person1 resource="#BBB-BBBB"/>
        <person2 resource="#CCC-CCCC"/>
        <fact>
            <date>
                <original>January 6, 1759</original>
                <formal>+01-06-1759</formal>
            </date>
            <place>
                <original>White House Plantation</original>
            </place>
        </fact>
    </relationship>
    <sourceDescription about="http://en.wikipedia.org/wiki/George_washington" id="EEE-EEEE">
        <citation>
            <value>"George Washington." Wikipedia, The Free Encyclopedia. Wikimedia Foundation, Inc. 24 October 2012.</value>
        </citation>
    </sourceDescription>
    <sourceDescription about="http://en.wikipedia.org/wiki/Martha_washington" id="FFF-FFFF">
        <citation>
            <value>"Martha Washington." Wikipedia, The Free Encyclopedia. Wikimedia Foundation, Inc. 24 October 2012.</value>
        </citation>
    </sourceDescription>
    <agent id="GGG-GGGG">
        <name>Ryan Heaton</name>
    </agent>
    <place id="888">
        <name>Pope's Creek, Westmoreland, Virginia, United States</name>
        <latitude>38.192353</latitude>
        <longitude>-76.904069</longitude>
    </place>
    <place id="999">
        <name>Mount Vernon, Fairfax County, Virginia, United States</name>
        <latitude>38.721144</latitude>
        <longitude>-77.109461</longitude>
    </place>
    <place id="KKK">
        <name>Chestnut Grove, New Kent, Virginia, United States</name>
        <latitude>37.518304</latitude>
        <longitude>-76.984148</longitude>
    </place>
</gedcomx>

1.3 Notational Conventions

1.3.1 Keywords

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14, RFC2119, as scoped to those conformance targets.

1.3.2 Namespace Prefixes

This document uses the following namespace prefixes:

prefix	namespace
gx	`http://gedcomx.org/v1/`
xsd	`http://www.w3.org/2001/XMLSchema`

For each data type specified by the GEDCOM X conceptual model, an associated XML schema type is supplied, which specifies how each of the properties of the data type are to be serialized in XML. The properties of each data type are serialized as either an XML attribute or as an XML child element of the containing XML element.

1.4 Compliance

In addition to the compliance requirements provided by this specification, all compliance requirements provided by the GEDCOM X Conceptual Model identified by http://gedcomx.org/conceptual-model/v1 are inherited.

2. Top-Level Data Types

This section specifies XML types for each top-level data type defined by the GEDCOM X Conceptual Model specification.

2.1 The "Person" Data Type

The gx:Person XML type is used to (de)serialize the http://gedcomx.org/v1/Person data type.

properties

name	description	XML property	XML type
private	Whether this instance of `Person` has been designated for limited distribution or display.	private (attribute)	xs:boolean
gender	The sex of the person as assigned at birth.	gx:gender	`gx:Gender`
names	The names of the person.	gx:name	`gx:Name`
facts	The facts of the person.	gx:fact	`gx:Fact`

examples

  <... id="local_id" extracted="false" private="false">

    <!-- ...the members of [gx:Subject](#subject)... -->

    <gx:gender>
      ...
    </gx:gender>
    <gx:name>
      ...
    </gx:name>
    ...
    <gx:fact>
      ...
    </gx:fact>
    ...
  </...>

2.2 The "Relationship" Data Type

The gx:Relationship XML type is used to (de)serialize the http://gedcomx.org/v1/Relationship data type.

properties

name	description	XML property	XML type
type	URI identifying the type of the relationship.	type (attribute)	`URI`
person1	Reference to the first person in the relationship.	gx:person1	`gx:ResourceReference`
person2	Reference to the second person in the relationship.	gx:person2	`gx:ResourceReference`
facts	The facts about the relationship.	gx:fact	`gx:Fact`

examples

  <... id="local_id" type="http://gedcomx.org/Couple" extracted="false">

    <!-- ...the members of [gx:Subject](#subject)... -->

    <gx:attribution>
      ...
    </gx:attribution>
    <gx:person1 resource="(uri reference to person 1)"/>
    <gx:person2 resource="(uri reference to person 2)"/>
    <gx:fact>
      ...
    </gx:fact>
    ...
  </...>

2.3 The "SourceDescription" Data Type

The gx:SourceDescription XML type is used to (de)serialize the http://gedcomx.org/v1/SourceDescription data type.

properties

name	description	XML property	XML type
id	The identifier for the XML element holding the source description data. The id attribute MUST conform to the constraints defined in Section 7, "Fragment Identifiers".	id (attribute)	xsd:string
resourceType	URI identifying the type of resource being described.	resourceType (attribute)	anyURI
citations	The citation(s) for this source.	gx:citation	`gx:SourceCitation`
mediaType	A hint about the media type of the resource being described.	mediaType (attribute)	xsd:string
about	A uniform resource identifier (URI) for the resource being described.	about (attribute)	anyURI
mediator	A reference to the entity that mediates access to the described source.	gx:mediator	`gx:ResourceReference`
publisher	A reference to the entity responsible for making the described source available.	gx:publisher	`gx:ResourceReference`
authors	A list of references to the entities that authored the described source.	gx:author	`gx:ResourceReference`
sources	A list of references to any sources from which this source is derived.	gx:source	`gx:SourceReference`
analysis	A reference to a document containing analysis about this source.	gx:analysis	`gx:ResourceReference`
componentOf	A reference to the source that contains this source.	gx:componentOf	`gx:SourceReference`
titles	The display name(s) for this source.	gx:title	`gx:TextValue`
notes	A list of notes about a source	gx:note	`gx:Note`
attribution	The attribution of this source.	gx:attribution	`gx:Attribution`
rights	The rights for this resource.	gx:rights	`gx:ResourceReference`
coverage	The coverage of the resource.	gx:coverage	`gx:Coverage`
descriptions	Human-readable descriptions of this source.	gx:description	`gx:TextValue`
identifiers	A list of identifiers for the resource being described.	gx:identifier	`gx:Identifier`
created	Timestamp of when the resource being described was created.	gx:created	xsd:dateTime
modified	Timestamp of when the resource being described was modified.	gx:modified	xsd:dateTime
published	Timestamp of when the resource being described was published.	gx:published	xsd:dateTime
repository	A reference to the repository that contains the described resource.	gx:repository	`gx:ResourceReference`

examples

  <... id="local_id" about="(uri reference to the source)" mediaType="..." resourceType="...">
    <gx:citation>
      ...
    </gx:citation>
    ...
    <gx:mediator resource="(uri reference to the mediator)"/>
    <gx:publisher resource="(uri reference to the publilsher)"/>
    <gx:source>
      ...
    </gx:source>
    ...
    <gx:analysis resource="(uri reference to an analysis document)"/>
    <gx:componentOf>
      ...
    </gx:componentOf>
    <gx:title>...the display name for this source...</gx:title>
    ...
    <gx:note>
      ...
    </gx:note>
    ...
    <gx:attribution>
      ...
    </gx:attribution>
    <gx:rights resource="..."/>
    ...
    <gx:coverage>
      ...
    </gx:coverage>
    <gx:description>...</gx:description>
    ...
    <gx:identifier>...</gx:identifier>
    <gx:created>...</gx:created>
    <gx:modified>...</gx:modified>
    <gx:repository resource="..."/>

    <!-- possibility of extension elements -->

  </...>

2.4 The "Agent" Data Type

The gx:Agent XML type is used to (de)serialize the http://gedcomx.org/v1/Agent data type.

properties

name	description	XML property	XML type
id	An identifier for the XML element holding the agent data. The id attribute MUST conform to the constraints defined in Section 7, "Fragment Identifiers".	id (attribute)	xsd:string
identifiers	Identifiers for this agent.	gx:identifier	`gx:Identifier`
names	The name(s) of the person or organization.	gx:name	`gx:TextValue`
homepage	The homepage of the person or organization.	gx:homepage	`gx:ResourceReference`
openid	The openid of the person or organization.	gx:openid	`gx:ResourceReference`
accounts	The online account(s) of the person or organization.	gx:account	`gx:OnlineAccount`
emails	The email address(es) of the person or organization.	gx:email	`gx:ResourceReference`
phones	The phone(s) (voice, fax, mobile) of the person or organization.	gx:phone	`gx:ResourceReference`
addresses	The address(es) of the person or organization.	gx:address	`gx:Address`
person	A reference to the person that describes this agent.	gx:person	`gx:ResourceReference`

examples

  <... id="local_id">
    <gx:identifier>...</gx:identifier>
    ...
    <gx:name>...</gx:name>
    ...
    <gx:homepage resource="..."/>
    <gx:openid resource="..."/>
    <gx:account>
      ...
    </gx:account>
    ...
    <gx:email resource="mailto:someone@gedcomx.org"/>
    ...
    <gx:phone resource="tel:+1-201-555-0123"/>
    ...
    <gx:address>
      ...
    </gx:address>
    ...
    <gx:person resource="..."/>

    <!-- possibility of extension elements -->

  </...>

2.5 The "Event" Data Type

The gx:Event is used to (de)serialize the http://gedcomx.org/v1/Event data type.

properties

name	description	XML property	XML type
type	URI identifying the type of the event.	type (attribute)	`URI`
date	The date of the event.	gx:date	`gx:Date`
place	The place of the event.	gx:place	`gx:Place`
roles	Information about how persons participated in the event.	gx:role	`gx:EventRole`

examples

  <... id="local_id" type="http://gedcomx.org/Marriage" >

    <!-- ...the members of [gx:Subject](#subject)... -->

    <gx:date>
      ...
    </gx:date>
    <gx:place>
      ...
    </gx:place>
    <gx:role>
      ...
    </gx:role>
    ...
  </...>

2.6 The "Document" Data Type

The gx:Document XML type is used to (de)serialize the http://gedcomx.org/v1/Document data type.

properties

name	description	XML property	XML type
type	The type of the document.	type (attribute)	`URI`
extracted	Whether this document is to be constrained as an extracted conclusion.	type (attribute)	xsd:boolean
textType	The type of text in the `text` property.	textType (attribute)	xsd:string
text	The text of the document.	gx:text	xsd:string
attribution	The attribution of this document.	gx:attribution	`gx:Attribution`

examples

  <... xml:lang="en" extracted="false" type="http://gedcomx.org/Analysis" textType="plain">

    <!-- ...the members of [gx:Conclusion](#conclusion)... -->

    <gx:attribution>
      ...
    </gx:attribution>
    <gx:text>...text of the document...</gx:text>
  </...>

2.7 The "PlaceDescription" Data Type

The gx:PlaceDescription is used to (de)serialize the http://gedcomx.org/v1/PlaceDescription data type.

properties

name	description	XML property	XML type
names	A list of standardized (or normalized), fully-qualified (in terms of what is known of the applicable jurisdictional hierarchy) names for this place that are applicable to this description of this place.	gx:name	`gx:TextValue`
type	A uniform resource identifier (URI) identifying the type of the place as it is applicable to this description.	type (attribute)	`URI`
place	An identifier for the place being described.	gx:place	`gx:ResourceReference`
jurisdiction	A reference to a description of the jurisdiction of this place.	gx:jurisdiction	`gx:ResourceReference`
latitude	Angular distance, in degrees, north or south of the Equator.	gx:latitude	xsd:double
longitude	Angular distance, in degrees, east or west of the Prime Meridian.	gx:latitude	xsd:double
temporalDescription	A description of the time period to which this place description is relevant.	gx:temporalDescription	`gx:Date`
spatialDescription	A reference to a geospatial description of this place.	gx:spatialDescription	`gx:ResourceReference`

examples

  <... id="local_id" type="http://identifier/for/the/place/type">

    <!-- ...the members of [gx:Subject](#subject)... -->

    <gx:name lang="en">Pope's Creek, Westmoreland, Virginia, United States</gx:name>
    <gx:name lang="zh">教皇的小河，威斯特摩兰，弗吉尼亚州，美国</gx:name>
    ...
    <gx:place resource="..."/>
    <gx:jurisdiction resource="..."/>
    <gx:latitude>27.9883575</gx:latitude>
    <gx:longitude>86.9252014</gx:longitude>
    <gx:temporalDescription>
      ...
    </gx:temporalDescription>
    <gx:spatialDescription resource="http://uri/for/KML/document"/>
    ...
  </...>

2.8 The "Group" Data Type

The gx:Group XML type is used to (de)serialize the http://gedcomx.org/v1/Group data type.

properties

name	description	XML property	XML type
names	A list of names of the group.	gx:name	`gx:TextValue`
date	The date of applicability of the group.	gx:date	`gx:Date`
place	The place of applicability of the group.	gx:place	`gx:PlaceReference`
roles	Information about how persons were associated with the group.	gx:role	`gx:GroupRole`

examples

  <...>

    <!-- ...the members of [gx:Subject](#subject)... -->

    <gx:name lang="en">Monticello Plantation</gx:name>
    <gx:name lang="zh">monticello种植园</gx:name>
    <gx:date>
      ...
    </gx:date>
    <gx:place>
      ...
    </gx:place>
    <gx:role>
      ...
    </gx:role>
    ...
  </...>

3. Component-Level Data Types

This section specifies XML types for each component-level data type defined by the conceptual model specification.

3.1 The "Identifier" Data Type

The gx:Identifier XML type is used to (de)serialize the http://gedcomx.org/v1/Identifier data type.

properties

name	description	XML property	XML type
value	The value of the identifier.	(child text)	xsd:string
type	URI identifying the type of the identifier.	type (attribute)	`URI`

examples

  <... type="http://gedcomx.org/Primary">value_of_identifier</...>

3.2 The "Attribution" Data Type

The gx:Attribution XML type is used to (de)serialize the http://gedcomx.org/Attribution data type.

properties

name	description	XML property	XML type
contributor	Reference to the contributor to whom the attributed data is attributed.	gx:contributor	`gx:ResourceReference`
modified	Timestamp of when the attributed data was contributed.	gx:modified	xsd:dateTime
changeMessage	A statement of why the attributed data is being provided by the contributor.	gx:changeMessage	xsd:string
creator	Reference to the agent that created the attributed data. The creator MAY be different from the contributor if changes were made to the attributed data.	gx:creator	`gx:ResourceReference`
created	Timestamp of when the attributed data was contributed.	gx:created	xsd:dateTime

examples

  <...>
    <gx:contributor resource="http://identifier/for/contributor"/>
    <gx:modified>2012-06-29T00:00:00</gx:modified>
    <gx:changeMessage>...change message here...</gx:changeMessage>
    <gx:creator resource="http://identifier/for/creator"/>
    <gx:created>2012-05-29T00:00:00</gx:created>

    <!-- possibility of extension elements -->

  </...>

3.3 The "Note" Data Type

The gx:Note XML type is used to (de)serialize the http://gedcomx.org/Note data type.

properties

name	description	XML property	XML type
lang	The locale identifier for the note.	xml:lang (attribute)	IETF BCP 47 locale tag
subject	A subject or title for the note.	gx:subject	xsd:string
text	The text of the note.	gx:text	xsd:string
attribution	The attribution of this note.	gx:attribution	`gx:Attribution`

examples

  <... xml:lang="en">
    <gx:subject>...subject or title...</gx:subject>
    <gx:text>...text of the note...</gx:text>
    <gx:attribution>
      ...
    </gx:attribution>

    <!-- possibility of extension elements -->

  </...>

3.4 The "TextValue" Data Type

The gx:TextValue XML type is used to (de)serialize the http://gedcomx.org/TextValue data type.

properties

name	description	XML property	XML type
lang	The locale identifier for the text of the note.	xml:lang (attribute)	IETF BCP 47 locale tag
value	The text value.	(child text)	xsd:string

examples

  <... xml:lang="en">...textual value...</...>

3.5 The "SourceCitation" Data Type

The gx:SourceCitation XML type is used to (de)serialize the http://gedcomx.org/v1/SourceCitation data type.

properties

name	description	XML property	XML type
lang	The locale identifier for the citation.	xml:lang (attribute)	IETF BCP 47 locale tag
value	A rendering of the full citation as a string.	gx:value	xsd:string

examples

  <... xml:lang="en">
    <gx:value>...a rendering of the full citation as a string...</gx:value>

    <!-- possibility of extension elements -->

  </...>

3.6 The "SourceReference" Data Type

The gx:SourceReference XML type is used to (de)serialized the http://gedcomx.org/v1/SourceReference data type.

properties

name	description	XML property	XML type
descriptionRef	Reference to a description of the source being referenced.	description (attribute)	`URI`
descriptionId	The id of the target source.	descriptionId (attribute)	xsd:string
attribution	The attribution of this source reference.	gx:attribution	`gx:Attribution`
qualifiers	Qualifiers for the reference, used to identify specific fragments of the source that are being referenced.	gx:qualifier	`gx:Qualifier`

examples

  <... description="http://identifier/for/description/of/source/being/referenced" descriptionId="...">
    <gx:attribution>
      ...
    </gx:attribution>
    <gx:qualifier name="http://gedcomx.org/RectangleRegion">...</gx:qualifier>

    <!-- possibility of extension elements -->

  </...>

3.7 The "EvidenceReference" Data Type

The gx:EvidenceReference XML type is used to (de)serialized the http://gedcomx.org/v1/EvidenceReference data type.

properties

name	description	XML property	XML type
resource	Reference to the supporting data.	resource (attribute)	`URI`
attribution	The attribution of this evidence reference.	gx:attribution	`gx:Attribution`

examples

  <... resource="http://identifier/for/data/being/referenced">
    <gx:attribution>
      ...
    </gx:attribution>

    <!-- possibility of extension elements -->

  </...>

3.8 The "OnlineAccount" Data Type

The gx:OnlineAccount XML type is used to (de)serialize the http://gedcomx.org/v1/OnlineAccount data type.

properties

name	description	XML property	XML type
serviceHomepage	The URI identifying the online service provider that holds the account being described.	gx:serviceHomepage	`gx:ResourceReference`
accountName	The name, label, or id that uniquely identifies the account maintained by the online service provider.	gx:accountName	xsd:string

examples

  <...>
    <gx:serviceHomepage resource="http://familysearch.org/"/>
    <gx:accountName>...</gx:accountName>

    <!-- possibility of extension elements -->

  </...>

3.9 The "Address" Data Type

The gx:Address XML type is used to (de)serialize the http://gedcomx.org/v1/Address data type.

properties

name	description	XML property	XML type
value	A full representation of the complete address.	gx:value	xsd:string
city	The city.	gx:city	xsd:string
country	The country.	gx:country	xsd:string
postalCode	The postal code.	gx:postalCode	xsd:string
stateOrProvince	The state or province.	gx:stateOrProvince	xsd:string
street	The street.	gx:street	xsd:string
street2	The street (second line).	gx:street2	xsd:string
street3	The street (third line).	gx:street3	xsd:string
street4	The street (fourth line).	gx:street4	xsd:string
street5	The street (fifth line).	gx:street5	xsd:string
street6	The street (sixth line).	gx:street6	xsd:string

examples

  <...>
    <gx:value>...</gx:value>
    <gx:city>...</gx:city>
    <gx:country>...</gx:country>
    <gx:postalCode>...</gx:postalCode>
    <gx:stateOrProvince>...</gx:stateOrProvince>
    <gx:street>...</gx:street>
    <gx:street2>...</gx:street2>
    <gx:street3>...</gx:street3>
    <gx:street4>...</gx:street4>
    <gx:street5>...</gx:street5>
    <gx:street6>...</gx:street6>

    <!-- possibility of extension elements -->

  </...>

3.10 The "Conclusion" Data Type

The gx:Conclusion XML type is used to (de)serialize the http://gedcomx.org/v1/Conclusion data type.

properties

name	description	XML property	XML type
id	An identifier for the XML element holding this conclusion's data. The id attribute MUST conform to the constraints defined in Section 7, "Fragment Identifiers".	id (attribute)	xsd:string
lang	The locale identifier for the conclusion.	xml:lang (attribute)	IETF BCP 47 locale tag
sources	The list of references to sources related to this conclusion.	gx:source	`gx:SourceReference`
analysis	Reference to a document containing analysis supporting this conclusion.	gx:analysis	`gx:ResourceReference`
notes	A list of notes about this conclusion.	gx:note	`gx:Note`
confidence	Reference to a confidence level for this conclusion.	confidence (attribute)	`URI`
attribution	The attribution of this conclusion.	gx:attribution	`gx:Attribution`

examples

  <... id="local_id" xml:lang="en" confidence="http://gedcomx.org/High">
    <gx:source>
      ...
    </gx:source>
    ...
    <gx:analysis resource="http://identifier/for/analysis/document"/>
    <gx:note>
      ...
    </gx:note>
    ...
    <gx:attribution>
      ...
    </gx:attribution>
    ...

    <!-- possibility of extension elements -->

  </...>

3.11 The "Subject" Data Type

The gx:Subject XML type is used to (de)serialize the http://gedcomx.org/v1/Subject data type.

properties

name	description	XML property	XML type
extracted	Whether this subject is to be constrained as an extracted conclusion.	extracted (attribute)	xsd:boolean
evidence	References to other subjects that support this subject.	gx:evidence	`gx:EvidenceReference`
media	References to multimedia resources for this subject, such as photos or videos.	gx:media	`gx:SourceReference`
identifiers	Identifiers for this subject.	gx:identifier	`gx:Identifier`

examples

  <... id="local_id" extracted="false">

    <!-- ...the members of [gx:Conclusion](#conclusion)... -->

    <gx:evidence>
      ...
    </gx:evidence>
    ...
    <gx:media>
      ...
    </gx:media>
    ...
    <gx:identifier>
      ...
    </gx:identifier>

    <!-- possibility of extension elements -->

  </...>

3.12 The "Gender" Data Type

The gx:Gender XML type is used to (de)serialize the http://gedcomx.org/v1/Gender data type.

properties

name	description	XML property	XML type
type	URI identifying the gender.	type (attribute)	`URI`

examples

<... id="local_id" type="http://gedcomx.org/Male">

  <!-- ...the members of [gx:Conclusion](#conclusion)... -->

</...>

3.13 The "Name" Data Type

The gx:Name XML type is used to (de)serialize the http://gedcomx.org/v1/Name data type.

properties

name	description	XML property	XML type
type	URI identifying the name type.	type (attribute)	`URI`
date	The date of applicability of the name.	gx:date	`gx:Date`
nameForms	The name form(s) that best represents this name; representations of the same name—*not* name variants (i.e., not nicknames or spelling variations).	gx:nameForm	`gx:NameForm`

examples

  <... id="local_id" type="http://gedcomx.org/BirthName">

    <!-- ...the members of [gx:Conclusion](#conclusion)... -->

    <gx:date>
      ...
    </gx:date>
    <gx:nameForm>
      ...
    </gx:nameForm>
    ...
  </...>

3.14 The "Fact" Data Type

The gx:Fact XML type is used to (de)serialize the http://gedcomx.org/v1/Fact data type.

properties

name	description	XML property	XML type
type	URI identifying the type of the fact.	type (attribute)	`URI`
date	The date of applicability of the fact.	gx:date	`gx:Date`
place	The place of applicability of the fact.	gx:place	`gx:PlaceReference`
value	The value of the fact.	gx:value	xsd:string
qualifiers	Qualifiers to add additional details about the fact.	gx:qualifier	`gx:Qualifier`

examples

  <... id="local_id" type="http://gedcomx.org/Birth">

    <!-- ...the members of [gx:Conclusion](#conclusion)... -->

    <gx:date>
      ...
    </gx:date>
    <gx:place>
      ...
    </gx:place>
    <gx:value>
      ...
    </gx:value>
    <gx:qualifier name="http://gedcomx.org/Age">...</gx:qualifier>
    ...
  </...>

3.15 The "EventRole" Data Type

The gx:EventRole XML type is used to (de)serialize the http://gedcomx.org/v1/EventRole data type.

properties

name	description	XML property	XML type
person	Reference to the event participant.	gx:person	`gx:ResourceReference`
type	URI identifying the participant's role.	type (attribute)	`URI`
details	Details about the role of participant in the event.	gx:details	xsd:string

examples

  <... id="local_id" type="http://gedcomx.org/Witness">

    <!-- ...the members of [gx:Conclusion](#conclusion)... -->

    <gx:person resource="http://identifier/for/person/1"/>
    <gx:details>...</gx:details>
  </...>

3.16 The "Date" Data Type

The gx:Date XML type is used to (de)serialize the http://gedcomx.org/v1/Date data type.

properties

name	description	XML property	XML type
original	The original value of the date as supplied by the contributor.	gx:original	xsd:string
formal	The standardized, formal representation of the date.	gx:formal	GEDCOM X Date

examples

  <...>
    <gx:original>...the original text...</gx:original>
    <gx:formal>...</gx:formal>

    <!-- possibility of extension elements -->

  </...>

3.17 The "PlaceReference" Data Type

The gx:PlaceReference is used to (de)serialize the http://gedcomx.org/v1/PlaceReference data type.

properties

name	description	XML property	XML type
original	The original place name text as supplied by the contributor.	gx:original	xsd:string
descriptionRef	A reference to a description of this place.	description (attribute)	`URI`

examples

  <... description="http://identifier/of/place/description/being/referenced">
    <gx:original>...the original text...</gx:original>

    <!-- possibility of extension elements -->

  </...>

3.18 The "NamePart" Data Type

The gx:NamePart XML type is used to (de)serialize the http://gedcomx.org/v1/NamePart data type.

properties

name	description	XML property	XML type
type	URI identifying the type of the name part.	type (attribute)	`URI`
value	The term(s) from the name that make up this name part.	value (attribute)	xsd:string
qualifiers	Qualifiers to add additional semantic meaning to the name part.	gx:qualifier	`gx:Qualifier`

examples

  <... type="http://gedcomx.org/Prefix" value="...value of the name part...">
    <qualifier name="http://gedcomx.org/First"/>
    ...

    <!-- possibility of extension elements -->

  </...>

3.19 The "NameForm" Data Type

The gx:NameForm XML type is used to (de)serialize the http://gedcomx.org/v1/NameForm data type.

properties

name	description	XML property	XML type
lang	The locale identifier for the name form.	xml:lang (attribute)	IETF BCP 47 locale tag
fullText	A full rendering of the name.	gx:fullText	xsd:string
parts	Any identified name parts from the name.	gx:part	`gx:NamePart`

examples

  <... xml:lang="en">
    <gx:fullText>...full text of the name form...</gx:fullText>
    <gx:part>
      ...
    </gx:part>
    ...

    <!-- possibility of extension elements -->

  </...>

3.20 The "Qualifier" Data Type

The gx:Qualifier XML type is used to (de)serialize the http://gedcomx.org/v1/Qualifier data type.

properties

name	description	XML property	XML type
name	The name of the qualifier.	name (attribute)	anyURI
value	The value of the qualifier.	(child text)	xsd:string

examples

  <... name="http://gedcomx.org/QualifierName">...qualifier value...</...>

3.21 The "Coverage" Data Type

The gx:Coverage XML type is used to (de)serialize the http://gedcomx.org/v1/Coverage data type.

properties

name	description	XML property	XML type
spatial	The spatial (i.e., geographic) coverage.	gx:spatial	`gx:PlaceReference`
temporal	The temporal coverage.	gx:temporal	`gx:Date`

examples

  <...>
    <gx:spatial>
      ...
    </gx:spatial>
    <gx:temporal>
      ...
    </gx:temporal>

    <!-- possibility of extension elements -->
  </...>

3.22 The "GroupRole" Data Type

The gx:GroupRole XML type is used to (de)serialize the http://gedcomx.org/v1/GroupRole data type.

properties

name	description	XML property	XML type
person	Reference to the group participant.	gx:person	`gx:ResourceReference`
type	URI identifying the participant's role.	type (attribute)	`URI`
date	The date of applicability of the role.	gx:date	`gx:Date`
details	Details about the role of participant in the group.	gx:details	xsd:string

examples

  <... id="local_id" type="...">

    <!-- ...the members of [gx:Conclusion](#conclusion)... -->

    <gx:person resource="http://identifier/for/person/1"/>
    <gx:date>
      ...
    </gx:date>
    <gx:details>...</gx:details>
  </...>

4 XML-Specific Data Types

This section describes a set of data types that are specific to the GEDCOM X XML media type, used for the convenience of serialization.

4.1 The URI

The xsd:anyURI XML type defined by the XML schema specification will be used to (de)serialize the URI.

4.2 The "ResourceReference" Data Type

The gx:ResourceReference XML type is used for properties that reference other resources. It uses the resource XML attribute to refer to other resources.

properties

name	description	XML property	XML type
resource	The URI to the resource being referenced.	resource (attribute)	anyURI

examples

<... resource="http://uri/to/resource/being/referenced"/>

4.3 The "Gedcomx" Data Type

The gx:Gedcomx XML type is used as a container for a set of GEDCOM X data.

properties

name	description	XML property	XML type	constraints
id	An identifier for the data set.	id (attribute)	xsd:string	OPTIONAL. If provided, the `id` attribute MUST conform to the constraints defined in Section 7, "Fragment Identifiers".
lang	The locale identifier for the data set.	xml:lang (attribute)	IETF BCP 47 locale tag	OPTIONAL. If not provided, the locale is determined per Internationalization Considerations.
attribution	The attribution of this data set.	gx:attribution	`gx:Attribution`	OPTIONAL.
persons	The list of persons contained in the data set.	gx:person	`gx:Person`	OPTIONAL.
relationships	The list of relationships contained in the data set.	gx:relationship	`gx:Relationship`	OPTIONAL.
sourceDescriptions	The list of source descriptions contained in the data set.	gx:sourceDescription	`gx:SourceDescription`	OPTIONAL.
agents	The list of agents contained in the data set.	gx:agent	`gx:Agent`	OPTIONAL.
events	The list of events contained in the data set.	gx:event	`gx:Event`	OPTIONAL.
documents	The list of documents contained in the data set.	gx:document	`gx:Document`	OPTIONAL.
places	The list of places contained in the data set.	gx:place	`gx:PlaceDescription`	OPTIONAL.
groups	The list of groups contained in the data set.	gx:group	`gx:Group`	OPTIONAL.
description	Reference to the description of this data set.	description (attribute)	`URI`	OPTIONAL. If provided, MUST resolve to an instance of `gx:SourceDescription`.

examples

<... id="local_id" lang="en" description="...">
  <gx:attribution>...</gx:attribution>
  <gx:person>...</gx:person>
  <gx:person>...</gx:person>
  ...
  <gx:relationship>...</gx:relationship>
  <gx:relationship>...</gx:relationship>
  ...
  <gx:sourceDescription>...</gx:sourceDescription>
  <gx:sourceDescription>...</gx:sourceDescription>
  ...
  <gx:agent>...</gx:agent>
  <gx:agent>...</gx:agent>
  ...
  <gx:event>...</gx:event>
  <gx:event>...</gx:event>
  ...
  <gx:document>...</gx:document>
  <gx:document>...</gx:document>
  ...
  <gx:place>...</gx:place>
  <gx:place>...</gx:place>
  ...
  <gx:group>...</gx:group>
  <gx:group>...</gx:group>
  ...

  <!-- possibility of extension elements -->
</...>

5. The GEDCOM X Element

The body of a document compliant with the GEDCOM X XML media type MUST be an instance of the root GEDCOM X Element, which is defined by an XML QName and an XML data types, as follows:

5.1 GEDCOM X Element QName

The QName of a GEDCOM X element is defined by a LocalPart of the value gedcomx and the NamespaceURI of the value http://gedcomx.org/v1/.

5.2 GEDCOM X Element Data Type

The data type of the GEDCOM X element is the gx:Gedcomx XML type.

Example

The following is an example of the structure of a GEDCOM X XML Element:

<gedcomx xmlns="http://gedcomx.org/v1/">

  <attribution>...</attribution>

  <person>...</person>
  <person>...</person>
  ...

  <relationship>...</relationship>
  <relationship>...</relationship>
  ...

  <sourceDescription>...</sourceDescription>
  <sourceDescription>...</sourceDescription>
  ...

  <agent>...</agent>
  <agent>...</agent>
  ...

  <event>...</event>
  <event>...</event>
  ...

  <document>...</document>
  <document>...</document>
  ...

  <place>...</place>
  <place>...</place>
  ...

  <group>...</group>
  <group>...</group>
  ...

  <!-- possibility of extension elements -->
</gedcomx>

6. Extensibility

In accordance with the extensibility provisions of the GEDCOM X Conceptual Model, extensions MAY be provided as XML elements or attributes on data types where extensions are not explicitly prohibited.

6.1 Data Type Extensions

New data types MAY be defined as extensions to the GEDCOM X XML Serialization Format by providing the following:

A conceptual data type definition as specified by the GEDCOM X Conceptual Model Section 5.1.
An XML name and namespace for each property of the data type, and whether the property is serialized as an XML element or attribute.

The namespace http://gedcomx.org/v1/ is reserved for elements and attributes defined by the GEDCOM X specification set. Data types defined outside the scope of the GEDCOM X specification set MUST NOT use the value http://gedcomx.org/v1/ as a namespace for the XML element or attribute.

Specifications that define new data types as GEDCOM X XML extensions MUST be published and made freely available and compatible with the terms and constraints that govern the GEDCOM X XML Serialization Format.

6.2 Known XML Element Extensions

GEDCOM X defines a set of elements that are explicitly associated with a data type such that GEDCOM X XML parsers MAY interpret the elements correctly if they are included as an extension element in a valid data type as defined by the conceptual model. The following elements are identified:

name	XML type
gx:person	`gx:Person`
gx:relationship	`gx:Relationship`
gx:sourceDescription	`gx:SourceDescription`
gx:agent	`gx:Agent`
gx:event	`gx:Event`
gx:document	`gx:Document`
gx:placeDescription	`gx:PlaceDescription`
gx:attribution	`gx:Attribution`
gx:note	`gx:Note`
gx:sourceReference	`gx:SourceReference`
gx:gender	`gx:Gender`
gx:name	`gx:Name`
gx:fact	`gx:Fact`

7. Fragment Identifiers

Fragment identifiers are used to identify specific elements (i.e. "fragments") within an XML document. The GEDCOM X XML serialization format specifies the use of the "id" attribute as the fragment identifier for any element in a given XML document. Note that some data types explicitly define an "id" attribute, but the XML serialization format allows the option of an "id" attribute on all elements for the purpose of identifying fragments of the XML document. The values of all fragment identifiers within a single XML document MUST be unique.

For more information about fragment identifiers, see RFC 3986, Section 3.5.