<!--*** scormcsf(1.1).dtd-->

<!--*** content: Root level of Content Structure Format representation.-->
<!ELEMENT content  (globalProperties? , block)>

<!--*** globalProperties: Properties of the content as whole.-->
<!ELEMENT globalProperties  (externalMetadata+ , curricularTaxonomy?)>

<!--*** block: A grouping of related structural elements.
		Blocks contain Sharable Content Objects or other Blocks.
		Blocks always contain other content elements.
		This holds an unique (to this content) ID identifier 
		for a particular Block.
		(other elements may refer to this unique ID)-->
<!ELEMENT block  ( (externalMetadata* , identification , prerequisites? , (sco | block)+ ) | blockAlias)>
<!ATTLIST block  id ID  #REQUIRED >

<!--*** externalMetadata: The value of this element refers or points
		to the location of the metadata document describing this
		content.-->
<!ELEMENT externalMetadata  (source , model , location )>

<!--*** curricularTaxonomy: Organizational methodology used to
		construct the content.-->
<!ELEMENT curricularTaxonomy  (source? , model , location? )>

<!--*** identification: Identifies content context-specific
		information.-->
<!ELEMENT identification  (title , description? , labels? )>

<!--*** prerequisites: Expression indicating what a student 
		must accomplish before beginning this content element.
		Content elements that a student must complete before
		beginning a block or Sharable Content Object. It uses a
		script that defines the logical rules to be applied.
		The script type must be defined.
		e.g.,   <prerequisites type="aicc_script">
				<![CDATA[B1&B2&S1]]> 
			</prerequisites> -->
<!ELEMENT prerequisites  (#PCDATA )>
<!ATTLIST prerequisites  type CDATA  #IMPLIED >

<!--*** sco: A SCO is the smallest element of instruction or testing
		to which a student may be routed by a LMS. It refers to
		"content" launched by the LMS system.
		This holds an unique (to this content) ID identifier.
		(other elements may refer to this unique ID).-->
<!ELEMENT sco  ( (externalMetadata* ,  identification , prerequisites? , timeLimit? , launch? , masteryScore? ) | scoAlias )>
<!ATTLIST sco  id ID  #REQUIRED >

<!--*** blockAlias: Reference to a previously defined Block. (permits
		one Block to be used more than once within a content
		structure).-->
<!ELEMENT blockAlias EMPTY>
<!ATTLIST blockAlias  targetID IDREF  #IMPLIED >

<!--*** source: Describes the source or originator of a given
		practice or specification to which this content adheres.
		e.g., "ADL CSF", or "AICC CMI", or "IEEE LOM" -->
<!ELEMENT source  (#PCDATA )>

<!--*** model: Name of a specific data model used by this content.
		e.g., "cmi", or "ARMY314", or "IMS v1.0" -->
<!ELEMENT model  (#PCDATA )>

<!--*** location: URI Location.-->
<!ELEMENT location  (#PCDATA )>

<!--*** title: Context specific title. May be used by an LMS system
		in menus, screens, etc.-->
<!ELEMENT title  (#PCDATA )>

<!--*** description: Context specific textual information about the
		content element.  It may contain the purpose, scope, or
		summary.  (Defined by content author.)-->
<!ELEMENT description  (#PCDATA )>

<!--*** labels: Context specific local label. (e.g., unit, chapter, 
		learning step)-->
<!ELEMENT labels  (curricular? , developer? )>

<!--*** Time values or actions associated with this SCO in this
		context.-->
<!ELEMENT timeLimit  (maxTimeAllowed? , timeLimitAction? )>

<!--*** launch: Information needed by an LMS to launch an SCO.-->
<!ELEMENT launch  (location , parameterString? , dataFromLMS? )>

<!--*** masteryScore: Values to be used in this content context for
		tracking score within an SCO.-->
<!ELEMENT masteryScore  (#PCDATA )>

<!--*** scoAlias: Reference to a previously defined SCO.  (Permits one
		SCO to be used more than once within a content.)-->
<!ELEMENT scoAlias EMPTY>
<!ATTLIST scoAlias  targetID IDREF  #IMPLIED >

<!--*** curricular label: Local name of the content element.
		e.g., "UNIT", "MODULE", "LEARNING STEP"-->
<!ELEMENT curricular  (#PCDATA )>

<!--*** developer label: An organization-specific identifier
		(e.g., D509)-->
<!ELEMENT developer  (#PCDATA )>

<!--*** maxTimeAllowed: The amount of time the student is allowed
		to have in the current attempt on the SCO.-->
<!ELEMENT maxTimeAllowed  (#PCDATA )>

<!--*** timeLimitAction: What the SCO is to do when the max time 
		allowed is exceeded. AICC examples: "exit,no message", 
		"continue,no message", "exit,message","continue,message".-->
<!ELEMENT timeLimitAction  (#PCDATA )>

<!--*** parameterString: String of characters needed to successfully 
		launch a SCO -->
<!ELEMENT parameterString  (#PCDATA )>

<!--*** dataFromLMS: unconstrained (undefined) initialization data
		expected by the SCO when it is launched by the LMS. -->
<!ELEMENT dataFromLMS  (#PCDATA )>