NOTE The template has been defined in the context of UK_Defence. Refer to the business context for details of related templates.

NOTE An explanation of a template and the associated instantiation path is provided in the Template overview section.

Figure 1 — Graphical Representation for Business Object Line of Maintenance

Line of Maintenance:

The definition of an Line of Maintenance object is: Data about the maintenance line for the related item.

Attribute name	Attribute description	Attribute type	Optionality
Description	This is the description of the maintenance line.	Intrinsic	Optional
End Date	This is the date and time on which the maintenance line can be considered to have become inoperative.	Intrinsic	Optional
ID	This is the identifier of the maintenance line.	Identifier	Mandatory
Name	This is the name of the maintenance line. Examples (from DEF STAN 00-60, DED 277, operations/maintenance level): "operator crew unit crew", "first line", "second line", "second line close support", "second line general support", "second line regional static", "embarked second line", "third line", "fourth line", "specialized repair activity".	Intrinsic	Mandatory
Related Item	This is the reference to the item for which the maintenance line is defined.	Product Design	Mandatory
Start Date	This is the date and time on which the maintenance line can be considered to be operative.	Intrinsic	Optional
Undertaken By	This is the reference organization that undertakes maintenance at the related line for the related product design.	Organization	Mandatory

Table 1 — Line_of_maintenance attribute details

Allow the Identification_assignment entity instantiated in this path to be referenced when this template is used.

Note: The Identification_assignment entity can be referenced in a template path by:

%^target = $line_of_maintenance.main_line%

where target is the parameter to which the Identification_assignment is bound.

Unique constraint: Unique line of maintenance

Each instance of the entity (External_class) within the data set shall be uniquely identified by a combination of the following parameters on this template (line_of_maintenance) namely: ID, ID_source_organization, name, name_source_organization, related_item.
The instance is referenced by the following template parameter: ext_class.

Any given identifier and name shall only be assigned to a maintenance line once.

External_class

-- Mark the External_class entity as referable when this template is used.
-- In other words, bind the External_class instance to the reference
-- parameter ext_class
%^ext_class = External_class%
External_class.id = '/NULL'
External_class.description = '/IGNORE'
External_class.name = '/NULL'
External_class.external_source -> External_class_library
External_class_library.id = 'urn:plcs:rdl:uk_defence'
External_class_library.description = '/IGNORE'
/identifier(
    ID=@ID,
    source_organization=@ID_source_organization,
    type='Organization_identification_code',
    items=^ext_class)/
%^main_line = $identifier.identifier%

-- [optional Description]
/assigning_descriptor(
    descr=@description,
    class_name='Description',
    ecl_id='urn:plcs:rdl:uk_defence',
    is_assigned_to=^ext_class)/

-- [optional end date]
Date_or_date_time_assignment
Date_or_date_time_assignment.items -> ^main_line
Date_or_date_time_assignment.assigned_date -> @end_date
%^end_date_time = Date_or_date_time_assignment%
/assigning_reference_data(
    items=^end_date_time,
    class_name='Date_actual_end',
    ecl_id='urn:plcs:rdl:uk_defence')/
/identifier(
    ID=@name,
    source_organization=@name_source_organization,
    type='Organization_name',
    items=^ext_class)/

-- Create the Classification_assignment entity
Classification_assignment
Classification_assignment.role = '/IGNORE'
Classification_assignment.items -> @related_item
Classification_assignment.assigned_class -> ^ext_class

-- Create the Classification_assignment entity
Classification_assignment
Classification_assignment.role = '/IGNORE'
Classification_assignment.items -> @undertaken_by
Classification_assignment.assigned_class -> ^ext_class

-- [optional start date]
Date_or_date_time_assignment
Date_or_date_time_assignment.items -> ^main_line
Date_or_date_time_assignment.assigned_date -> @start_date
%^start_date_time = Date_or_date_time_assignment%
/assigning_reference_data(
    items=^start_date_time,
    class_name='Date_actual_start',
    ecl_id='urn:plcs:rdl:uk_defence')/

The following entities are instantiated with attributes as specified:

Entity in path	Value	Inherited from
External_class.id	'/NULL'	Class.id
External_class.description	'/IGNORE'	Class.description
External_class.name	'/NULL'	Class.name
External_class_library.id	'urn:plcs:rdl:uk_defence'	—
External_class_library.description	'/IGNORE'	—
Classification_assignment.role	'/IGNORE'	—
Classification_assignment.role	'/IGNORE'	—

The instance diagram in Figure 4 shows an example of the EXPRESS entities and templates that are instantiated by the template:

/line_of_maintenance(description='first line description', end_date='@416', items='@224', ID='L01', ID_source_organization='UK_Defence', name='first line', name_source_organization='UK_Defence', related_item='@224', start_date='@421', undertaken_by='@335')/

(an illustration of the consolidated line_of_maintenance template is shown in Figure 5 below.)