MIL-DTL-87269D
3.4.2.2 Location elements. Location elements are deined by ISO 10744. Elements shall be referenced by
other elements in accordance with ISO 10744.
3.4.2.3 Logistics support and task-analysis link. The contractor shall establish linkages (information-access
capabilities) with the IETMDB when external logistics support and task-analysis systems have been developed.
3.4.3 Primitive elements. An IETMDB shall be composed of the primitive elements deined in the generic
layer DTD. Content and style for these elements shall conform to the requirements of MIL-DTL-87268.
3.4.3.1 Textual information. Textual information shall consist of alphanumeric (i.e., character) data. When
required, textual information shall contain embedded references to some higher level elements, such as
those describing parts or consumables.
3.4.3.2 Tables. Tables shall be represented as a series of separate entries, each entry being associated with
a speciic row and column intersection (cell) of a table. Each entry in the table may be associated with
other primitive types of information presentation and attributes. Each entry may refer (through a relationship)
to any other template element or primitive element in the IETMDB.
3.4.3.3 Graphics. Graphics (drawings, illustrations) information shall be structured in a hierarchical manner
and consist of logically related groups. Graphics shall be composed of a series of illustrations which can be
overlaid on each other to build a complete graphic. These graphic "building blocks" are called graphic
primitives. Graphic primitives may be combined to produce composite information which can be referenced
and selected. For Information about composing graphics (see 6.1.2.1.).
3.4.3.4 Audio, video, and process elements. The audio, video, and process elements shall provide the
capability for the author to deine an audio sequence, a video sequence, or a call to a software process.
3.4.3.5 Dialog elements. Dialog elements are the basic element which provides the capability for user
interaction with the TI. During a presentation these elements shall be used to prompt the user to input a
response, select a choice from a set of alternatives, or to select items from within a text, table or graphic.
3.4.4 Context dependent iltering. Context dependent iltering shall be accomplished through author-deined
preconditions. Preconditions shall contain an expression which will contain all the information necessary to
identify what conditions must be present to display the TI.
3.4.4.1 Preconditions. A precondition shall contain an expression which identiies the conditions which must
be present to display the TI. Precondition elements may be referenced by node elements. This implies that
the element s information is relevant only if the precondition is true in the presentation situation.
3.4.4.2 Post conditions. Post conditions shall assert the value of an expression to a property. Once
these property values are asserted, they shall be accessible to the presentation software for later testing
and processing to determine the user s situation.
3.4.4.3 Expressions. Expressions developed for an IETMDB shall conform to one of four types of
expressions deined in the CDM. The irst is a binary operation between two expressions; the second is a
unary operation which is applied to an expression; the third and fourth are operations that identify a
unique property (variable) or a value to be used in an expression.
3.5 Content speciic layer. All TI shall be structured in accordance with a content speciic DTD. One content
speciic DTD shall apply for an entire set of information regardless of the desired access to the information.
The CDM shall deine the content and structure of the TI but shall not describe format information.
3.5.1 Control of content speciic DTDs. The contractor shall not exchange TI with the DoD unless it has
been developed in accordance with the generic layer DTD and one or more of the latest versions of DoD
approved content speciic DTDs. If a content speciic DTD does not exist which meets the contract s
requirements, the contractor shall submit a content speciic DTD to the Government for approval.
3.5.2 Development of content speciic DTDs. For guidance to develop content speciic DTDs (see 6.1.2.2 ).
3.5.2.1 Use of generic DTD primitive elements. The generic layer of the CDM shall deine a set of
primitive elements. Those elements shall be available to any content speciic layer DTD that includes the
generic layer in an entity declaration and corresponding entity reference. Any element deined within a
content speciic DTD which requires the use of any of the primitive elements need only include text, table,
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