<!-- ilias_co.dtd for creating ILIAS Content (Learning Modules and DigiLib Objects) -->
<!-- , see http://www.ilias.uni-koeln.de/download/dtd/ilias_co.dtd for current version -->
<!-- Initial version by Maik Stuehrenberg (Giessen University) for the BMBF-funded project MiLCA (Medienintensive Lehrmodule in der Computerlinguistik-Ausbildung), modelled after LOM version 1 Final Draft -->
<!-- Modifications and adoption to ILIAS made by Maik Stuehrenberg (Giessen University), Martin Rus, Matthias Rulinski, Alexander Killing, Matthias Kunkel (ILIAS open source, University of Cologne), Sascha Hofmann (Databay AG, Aachen) -->
<!-- For comments refer to our mailing list: xml-ilias@uni-koeln.de -->
<!-- $Id$ -->

<!--
	Things still missing in ILIAS 3 (search for TO_IMPLEMENT in this document)
	- Test (assessment is supposed to get a dtd of its own, but we'll need
	- a reference concept for this)
	- Internal Link Type Bibliography (is this needed?)
	- Structure Aliases
	- Formula
	- Markup
	- Anchor
-->

<!-- Language codes referring to ISO 639-1 Alpha-2 code, see http://www.oasis-open.org/cover/iso639a.html for details -->
<!ENTITY % langcode "none | aa | ab | af | am | ar | as | ay | az | ba | be | bg | bh | bi | bn | bo | br | ca | co | cs | cy | da | de | dz | el | en | eo | es | et | eu | fa | fi | fj | fo | fr | fy | ga | gd | gl | gn | gu | ha | he | hi | hr | hu | hy | ia | ie | ik | id | is | it | iu | ja | jv | ka | kk | kl | km | kn | ko | ks | ku | ky | la | ln | lo | lt | lv | mg | mi | mk | ml | mn | mo | mr | ms | mt | my | na | ne | nl | no | oc | om | or | pa | pl | ps | pt | qu | rm | rn | ro | ru | rw | sa | sd | sg | sh  | si | sk | sl | sm | sn | so | sq | sr | ss | st | su | sv | sw | ta | te | tg | th | ti | tk | tl | tn | to | tr | ts | tt | tw | ug | uk | ur | uz | vi | vo | wo | xh | yi | yo | za | zh | zu">

<!-- Types of (textual) content -->
<!-- TO_IMPLEMENT <!ENTITY % text "#PCDATA | br | Comment | PageTurn | Footnote | Emph | Strong | Quotation | Code | Formula | ExtLink | IntLink | Anchor | Markup">
<!ENTITY % commenttext "#PCDATA | br | Emph | PageTurn | Footnote | Strong | Quotation | Code | Formula | ExtLink | IntLink | Anchor | Markup">
<!ENTITY % emphtext "#PCDATA | br | Comment | PageTurn | Footnote | Strong | Quotation | Code | Formula | ExtLink | IntLink | Anchor">
<!ENTITY % strongtext "#PCDATA | br | Comment | PageTurn | Footnote | Emph | Quotation | Code | Formula | ExtLink | IntLink | Anchor">
<!ENTITY % linktext "#PCDATA | br | Comment | Emph | Strong | Quotation | Code">
<!ENTITY % simpletext "#PCDATA | br | Emph | Strong | Quotation | Code | Formula | ExtLink | IntLink | Anchor">
<!ENTITY % footnotetext "#PCDATA | br | Emph | Strong | ExtLink | IntLink">
<!ENTITY % titletext "#PCDATA | br | Emph | Strong | Quotation | Code | Formula"> -->
<!ENTITY % text "#PCDATA | br | Comment | PageTurn | Footnote | Emph | Strong | Quotation | Code | ExtLink | IntLink">
<!ENTITY % commenttext "#PCDATA | br | Emph | PageTurn | Footnote | Strong | Quotation | Code | ExtLink | IntLink">
<!ENTITY % emphtext "#PCDATA | br | Comment | PageTurn | Footnote | Strong | Quotation | Code | ExtLink | IntLink">
<!ENTITY % strongtext "#PCDATA | br | Comment | PageTurn | Footnote | Emph | Quotation | Code | ExtLink | IntLink">
<!ENTITY % linktext "#PCDATA | br | Comment | Emph | Strong | Quotation | Code">
<!ENTITY % simpletext "#PCDATA | br | Emph | Strong | Quotation | Code | ExtLink | IntLink">
<!ENTITY % footnotetext "#PCDATA | br | Emph | Strong | ExtLink | IntLink">
<!ENTITY % titletext "#PCDATA | br | Emph | Strong | Quotation | Code">

<!-- ContentObject -->
<!-- Object of highest complexity; ContentObject is a container for all content, meta data and layout information; it is comparable to an entire book-->
<!-- ContentObjects are comparable to LOM LearningObjects of aggregation level 3 -->
<!-- TO_IMPLEMENT <!ELEMENT ContentObject (MetaData, (StructureObject | PageObject | MediaObject)+, Test?, Glossary?, Bibliography?, Layout?)> -->
<!ELEMENT ContentObject (MetaData, (StructureObject | PageObject | MediaObject)*, Glossary?, Bibliography?, Layout?)>
<!-- If ContentObject is Glossary, no StructureObjects or PageObjects must be included -->
<!ATTLIST ContentObject
	Type (LearningModule | LibObject | Glossary) #REQUIRED
>

<!-- StructureObject -->
<!-- Object for structuring the learning material of a LearningModule and comparable to a chapter of a book; a StructureObject contains other StructureObjects (=chapters) and PageObjects (=pages) or a StructureAlias-->
<!-- StructureObjects are comparable to LOM LearningObjects of aggregation level 3 -->
<!-- TO_IMPLEMENT <!ELEMENT StructureObject (((MetaData, (StructureObject | PageObject)+) | StructureAlias), Layout?)> -->
<!ELEMENT StructureObject ((MetaData, (StructureObject | PageObject)+), Layout?)>
<!-- StructureAlias -->
<!-- Alias for an already existing StructureObject; this allows an easy reuse of existing StructureObjects; an alias is not a copy but only a reference to the original object-->
<!-- TO_IMPLEMENT <!ELEMENT StructureAlias EMPTY>
<!ATTLIST StructureAlias
	OriginId CDATA #REQUIRED
> -->

<!-- PageObject -->
<!-- Object for displaying content on a screen and comparable to a page of a book; a PageObject contains MediaObjects (=images, applets, ...) and/or paragraphs of textual content; a PageObject must not include StructureObjects or PageObjects! -->
<!-- PageObjects are comparable to LOM LearningObjects of aggregation level 2 -->
<!ELEMENT PageObject (((MetaData, PageContent*) | PageAlias), Layout?)>
<!ELEMENT PageContent ((Paragraph | MediaObject | Table | List | FileList | Question), BibItemIdentifier*)>
<!-- BibItemIdentifier specify from which BibItem(s) the content comes -->
<!ELEMENT BibItemIdentifier EMPTY>
<!ATTLIST BibItemIdentifier
	Catalog CDATA #IMPLIED
	Entry CDATA #REQUIRED
>

<!-- PageAlias -->
<!-- Alias for an already existing PageObject; this allows an easy reuse of existing PageObjects; an alias is not a copy but only a reference to the original object-->
<!ELEMENT PageAlias EMPTY>
<!ATTLIST PageAlias
	OriginId CDATA #REQUIRED
>

<!-- PageTurn -->
<!ELEMENT PageTurn (BibItemIdentifier)>
<!ATTLIST PageTurn
	NumberingType (Roman | Arabic | Alphanumeric) #REQUIRED
	Number CDATA #IMPLIED
>

<!-- MediaObject -->
<!-- Object of lowest complexity that contains only raw media data or fragments (e.g. an image or applet); Textual content cannot be a MediaObject! -->
<!-- MediaObjects are comparable to LOM LearningObjects of aggregation level 1 -->
<!ELEMENT MediaObject ((MetaData, MediaItem+) | (MediaAlias, MediaAliasItem+))>

<!-- MediaAlias -->
<!-- Alias for an already existing MediaObject; this allows an easy reuse of existing MediaObjects; an alias is not a copy but only a reference to the original object-->
<!ELEMENT MediaAlias EMPTY>
<!ATTLIST MediaAlias
	OriginId CDATA #REQUIRED
>

<!-- MediaAliasItem -->
<!ELEMENT MediaAliasItem (Layout?, Caption?, Parameter*)>
<!ATTLIST MediaAliasItem
	Purpose (Standard | Fullscreen | Additional) #REQUIRED
>

<!-- MediaItem -->
<!-- Location and Format as defined in Technical Section of Meta Data -->
<!--  Max. one Standard and one Fullscreen Item per MediaObject -->
<!ELEMENT MediaItem (Location, Format?, Layout?, Caption?, Parameter*, MapArea*)>
<!ATTLIST MediaItem
	Purpose (Standard | Fullscreen | Additional) #REQUIRED
>

<!-- MapAreas should be only defined for image objects with purpose
	Standard or Fullscreen -->
<!ELEMENT MapArea (ExtLink | IntLink)>
<!ATTLIST MapArea
	Shape (Rect | Circle | Poly) #REQUIRED
	Coords CDATA #IMPLIED
>

<!-- Metadata -->
<!-- MetaData referring to LOM/SCORM standard, see http://ltsc.ieee.org/doc/wg12/LOM_1484_12_1_v1_Final_Draft.pdf for details -->
<!-- The base scheme consists of nine categories: -->
<!-- Relation and Classification can be used more than once in EducationalUnits but is useless in most of LearningObjects -->
<!ELEMENT MetaData (General, Lifecycle?, Meta-Metadata?, Technical?, Educational?, Rights?, Relation*, Annotation*, Classification*)>
<!-- 1 General information about the resource as a whole -->
<!ELEMENT General (Identifier+, Title, Language+, Description+, Keyword+, Coverage?)>
<!ATTLIST General
	Structure (Atomic | Collection | Networked | Hierarchical | Linear) #REQUIRED
>
<!-- 1.1 A global unique label, that identifies this learning object -->
<!ELEMENT Identifier EMPTY>
<!ATTLIST Identifier
	Catalog CDATA #IMPLIED
	Entry ID #REQUIRED
>
<!-- 1.2 Name given to this resource-->
<!-- Title is the only element in MetaData having non #PCDATA content! due to use outside of MetaData -->
<!ELEMENT Title (%titletext;)*>
<!ATTLIST Title
	Language (%langcode;) #REQUIRED
>
<!-- 1.3 The primary human language used within this resource to communicate to the intended user-->
<!ELEMENT Language EMPTY>
<!ATTLIST Language
	Language (%langcode;) #REQUIRED
>

<!-- 1.4 A textual description of the content of this resource being described -->
<!ELEMENT Description (#PCDATA)>
<!ATTLIST Description
	Language (%langcode;) #REQUIRED
>
<!-- 1.5 Keywords or phrases describing this resource -->
<!ELEMENT Keyword (#PCDATA)>
<!ATTLIST Keyword
	Language (%langcode;) #REQUIRED
>
<!-- 1.6 The span or extent of such things as time, culture, geography or region that applies to this resource -->
<!ELEMENT Coverage (#PCDATA)>
<!ATTLIST Coverage
	Language (%langcode;) #REQUIRED
>
<!-- 2. History and current state of the resource and those who have affected this resource during its evolution -->
<!-- Contribute: (Creator | Validator) are NOT valid Role attributes! -->
<!ELEMENT Lifecycle (Version, Contribute+)>
<!ATTLIST Lifecycle
	Status (Draft | Final | Revised | Unavailable) #REQUIRED
>
<!--2.1 The edition of this resource -->
<!ELEMENT Version (#PCDATA)>
<!ATTLIST Version
	Language (%langcode;) #REQUIRED
>
<!-- 2.3 This sub-category describes those people or organization that have affected the state of this resource during its evolution-->
<!ELEMENT Contribute (Entity+, Date)>
<!ATTLIST Contribute
	Role (Author | Publisher | Unknown | Initiator | Terminator | Editor | GraphicalDesigner | TechnicalImplementer | ContentProvider | TechnicalValidator | EducationalValidator | ScriptWriter | InstructionalDesigner | SubjectMatterExpert | Creator | Validator) #REQUIRED
>
<!-- 2.3.2 The identification of and information about the people or organizations contributing to this resource, most relevant first-->
<!-- LOM standard proposed Entity (#PCDATA | vCard). Support for vCards will be added later. -->
<!ELEMENT Entity (#PCDATA)>
<!-- 2.3.3 This sub-category defines the date of the contribution-->
<!ELEMENT Date (#PCDATA)>
<!-- 3. Specific information about the meta-data record itself -->
<!-- Contribute: Only (Creator | Validator) are valid Role attributes! -->
<!ELEMENT Meta-Metadata (Identifier+, Contribute+)>
<!ATTLIST Meta-Metadata
	MetadataScheme CDATA #FIXED "LOM v 1.0"
	Language (%langcode;) #IMPLIED
>
<!-- 4. Technical requirements and characteristics of the resource -->
<!ELEMENT Technical (Format*, Size?, Location*, (Requirement* | OrComposite*)?, InstallationRemarks?, OtherPlatformRequirements?, Duration?)>
<!-- 4.1 Format is Mime Type e.g. (application-x-authorware-bin | application-x-authorware-map | application-x-authorware-seg | application-andrew-inset | application-excel | application-hstu | application-mac-binhex40 | application-mac-compactpro | application-msword | application-octet-stream | application-oda | application-pdf | application-postscript | application-powerpoint | application-rtf | application-smil | application-vnd.mif | application-vnd.ms-powerpoint | application-x-bcpio | application-x-cdlink | application-x-chess-pgn | application-x-compress | application-x-cpio | application-x-csh | application-x-director | application-x-dvi | application-x-futuresplash | application-x-gtar | application-x-gzip | application-x-hdf | application-x-httpd-cgi | application-x-javascript | application-x-koan | application-x-latex | application-x-mif | application-x-netcdf | application-x-sh | application-x-shar | application-x-shockwave-flash | application-x-stuffit | application-x-sv4cpio | application-x-sv4crc | application-x-tar | application-x-tcl | application-x-tex | application-x-texinfo | application-x-troff | application-x-troff-man | application-x-troff-me | application-x-troff-ms | application-x-ustar | application-x-wais-source | application-zip | audio-basic | audio-midi | audio-mpeg | audio-x-aiff | audio-x-pn-realaudio | audio-x-pn-realaudio-plugin | audio-x-realaudio | audio-x-wav | chemical-x-pdb | image-bmp | image-fif | image-gif | image-ief | image-jpeg | image-pict | image-png | image-tiff | image-x-cmu-raster | image-x-freehand | image-x-portable-anymap | image-x-portable-bitmap | image-x-portable-graymap | image-x-portable-pixmap | image-x-rgb | image-x-bmp | image-x-xbitmap | image-x-xpixmap | image-x-xwindowdump | model-iges | model-mesh | model-vrml | text-css | text-html | text-plain | text-richtext | text-sgml | text-tab-separated-values | text-x-setext | text-x-sgml | text-xml | video-mpeg | video-quicktime | video-x-msvideo | video-x-sgi-movie | x-conference-x-cooltalk | x-world-x-vrml | httpd-unix-directory) -->
<!ELEMENT Format (#PCDATA)>
<!-- 4.2 The size of the digital resource in bytes. Only the digits '0'..'9' should be used; the unit is bytes, not MBytes,GB,etc.-->
<!ELEMENT Size (#PCDATA)>
<!-- 4.3 A string that is used to access this resource, see LOM annotation-->
<!ELEMENT Location (#PCDATA)>
<!ATTLIST Location
	Type (LocalFile | Reference) #REQUIRED
>
<!-- 4.4 Grouping of multiple requirements -->
<!-- 4.4.1 Defining attributes of OrComposite -->
<!-- This sub-category describes the technical capabilities required in order to use this resource -->
<!ELEMENT OrComposite (Requirement+)>
<!ELEMENT Requirement (Type)>
<!ELEMENT Type (OperatingSystem | Browser)>
<!ELEMENT OperatingSystem EMPTY>
<!ATTLIST OperatingSystem
	Name (PC-DOS | MS-Windows | MacOS | Unix | Multi-OS | None) #REQUIRED
	MinimumVersion CDATA #IMPLIED
	MaximumVersion CDATA #IMPLIED
>
<!ELEMENT Browser EMPTY>
<!ATTLIST Browser
	Name (Any | NetscapeCommunicator | MS-InternetExplorer | Opera | Amaya | Mozilla) #REQUIRED
	MinimumVersion CDATA #IMPLIED
	MaximumVersion CDATA #IMPLIED
>
<!-- 4.5 Description on how to install this resource-->
<!ELEMENT InstallationRemarks (#PCDATA)>
<!ATTLIST InstallationRemarks
	Language (%langcode;) #REQUIRED
>
<!-- 4.6 Information about other software and hrdware requirements -->
<!ELEMENT OtherPlatformRequirements (#PCDATA)>
<!ATTLIST OtherPlatformRequirements
	Language (%langcode;) #REQUIRED
>
<!-- 4.7 Time continuous resource takes when  -->
<!ELEMENT Duration (#PCDATA)>
<!-- 5. Key educational or pedagogic characteristics of the resource -->
<!ELEMENT Educational (TypicalAgeRange+, TypicalLearningTime, Description*, Language*)>
<!ATTLIST Educational
	InteractivityType (Active | Expositive | Mixed) #REQUIRED
	LearningResourceType (Exercise | Simulation | Questionnaire | Diagram | Figure | Graph | Index | Slide | Table | NarrativeText | Exam | Experiment | ProblemStatement | SelfAssessment | Lecture) #REQUIRED
	InteractivityLevel (VeryLow | Low | Medium | High | VeryHigh) #REQUIRED
	SemanticDensity (VeryLow | Low | Medium | High | VeryHigh) #REQUIRED
	IntendedEndUserRole (Teacher | Author | Learner | Manager) #REQUIRED
	Context (School | HigherEducation | Training | Other) #REQUIRED
	Difficulty (VeryEasy | Easy | Medium | Difficult | VeryDifficult) #REQUIRED
>
<!-- 5.7 Age of the typical intended user-->
<!ELEMENT TypicalAgeRange (#PCDATA)>
<!ATTLIST TypicalAgeRange
	Language (%langcode;) #REQUIRED
>
<!-- 5.9 Approximate or typical time it takes to work with this resource-->
<!ELEMENT TypicalLearningTime (#PCDATA)>
<!-- 6. Intellectual property rights and conditions of use for this resource -->
<!ELEMENT Rights (Description)>
<!ATTLIST Rights
	Cost (Yes | No) #REQUIRED
	CopyrightAndOtherRestrictions (Yes | No) #REQUIRED
>
<!-- 7. Relationship between this resource and other resources, if any -->
<!ELEMENT Relation (Resource)>
<!ATTLIST Relation
	Kind (IsPartOf | HasPart | IsVersionOf | HasVersion | IsFormatOf | HasFormat | References | IsReferencedBy | IsBasedOn | IsBasisFor | Requires | IsRequiredBy) #REQUIRED
>
<!-- 7.2  The target resource that this relationship references -->
<!-- the Identifier should be of type IDREF cause its value is a reference -->
<!-- using the XML IDREF stating the CatalogEntry is obsolete (the CatalogEntry information could be retrieved with XSLT) -->
<!ELEMENT Resource (Identifier_+, Description+)>
<!-- 7.2.1 A globally unique label, that identifies the target learning object-->
<!ELEMENT Identifier_ EMPTY>
<!ATTLIST Identifier_
	Catalog CDATA #IMPLIED
	Entry IDREF #IMPLIED
>
<!-- 8. Comments on the educational use of this resource-->
<!ELEMENT Annotation (Entity, Date, Description)>
<!-- 9. Description where this resource is placed within a particular classification system-->
<!ELEMENT Classification (TaxonPath+, Description, Keyword+)>
<!ATTLIST Classification
	Purpose (Discipline | Idea | Prerequisite | EducationalObjective | AccessibilityRestrictions | EducationalLevel | SkillLevel | SecurityLevel | Competency) #REQUIRED
>
<!-- 9.2 This sub-category describes a taxonomic path in a specified classification system. see LOM-->
<!ELEMENT TaxonPath (Source, Taxon+)>
<!-- 9.2.1 The name of the classification system-->
<!ELEMENT Source (#PCDATA)>
<!ATTLIST Source
	Language (%langcode;) #REQUIRED
>
<!-- 9.2.2 -->
<!ELEMENT Taxon (#PCDATA)>
<!ATTLIST Taxon
	Language (%langcode;) #REQUIRED
	Id ID #IMPLIED
>

<!-- Paragraph -->
<!-- All textual content of a PageObject has to be divided in single paragraphs -->
<!ELEMENT Paragraph (%text;)*>
<!ATTLIST Paragraph
	Language (%langcode;) #REQUIRED
	Characteristic (Headline1 | Headline2 | Headline3 | Example | Citation | Mnemonic | Additional | List | Remark | Code | TableContent) #IMPLIED
	SubCharacteristic CDATA #IMPLIED
	AutoIndent (y | n) #IMPLIED
	ShowLineNumbers (y | n) #IMPLIED
	DownloadTitle CDATA #IMPLIED
>

<!-- br -->
<!ELEMENT br EMPTY>

<!-- Comment -->
<!ELEMENT Comment (%commenttext;)*>
<!ATTLIST Comment
	Language (%langcode;) #REQUIRED
>

<!-- Emph -->
<!ELEMENT Emph (%emphtext;)*>
<!ATTLIST Emph
	Reason (Keyword | Intuition | MetaLanguageUse) #IMPLIED
>

<!-- Footnote -->
<!ELEMENT Footnote (%footnotetext;)*>
<!ATTLIST Footnote
	Creator (Editor | Translator | Author) #IMPLIED
>

<!-- Strong -->
<!ELEMENT Strong (%strongtext;)*>
<!ATTLIST Strong
	Reason (Keyword | Intuition | MetaLanguageUse) #IMPLIED
>

<!-- Quotation -->
<!ELEMENT Quotation (%text;)*>
<!ATTLIST Quotation
	Language (%langcode;) #REQUIRED
	Reference IDREF #IMPLIED
>

<!-- Code -->
<!ELEMENT Code (#PCDATA | br)*>
<!ATTLIST Code
	Id ID #IMPLIED
	ProgrammingLanguage CDATA #IMPLIED
>

<!-- Formula -->
<!-- TO_IMPLEMENT <!ELEMENT Formula (#PCDATA | br)*>
<!ATTLIST Formula
	Id ID #IMPLIED
> -->

<!-- List -->
<!ELEMENT List (Title?, ListItem+)>
<!ATTLIST List
	Id ID #IMPLIED
	Type (Ordered | Unordered) #REQUIRED
	NumberingType (Roman | roman | Alphabetic | alphabetic | Number) #IMPLIED
>
<!ELEMENT ListItem (PageContent*)>

<!-- FileList -->
<!ELEMENT FileList (Title?, FileItem*)>
<!ELEMENT FileItem (Identifier, Location, Format?)>

<!-- Table -->
<!-- Table model is some kind of a mixture of mimalized CALS and HTML dtd -->
<!-- Only a minimum of style elements and attributes defined -->
<!ELEMENT Table (Title?, Caption?, Summary?, TableRow+)>
<!ATTLIST Table
	Language (%langcode;) #REQUIRED
	Id ID #IMPLIED
	Width CDATA #IMPLIED
	Border CDATA #IMPLIED
	HorizontalAlign (Left | Center | Right | LeftFloat | RightFloat) #IMPLIED
	CellPadding CDATA #IMPLIED
	CellSpacing CDATA #IMPLIED
	Class CDATA #IMPLIED
>
<!ELEMENT Caption (%titletext;)*>
<!ATTLIST Caption
	Align (top | bottom) #REQUIRED
>
<!ELEMENT Summary (%simpletext;)*>
<!ELEMENT TableRow (TableData+)>
<!ELEMENT TableData (PageContent*)>
<!ATTLIST TableData
	Width CDATA #IMPLIED
	Class CDATA #IMPLIED
>

<!-- ExtLink -->
<!-- An element to link to _external_ resources outside the ILIAS system, e.g. to a web site-->
<!-- It is fixed to xlink-type simple, only required attribute value is href -->
<!ELEMENT ExtLink (%linktext;)*>
<!ATTLIST ExtLink
	Href CDATA #REQUIRED
	Title CDATA #IMPLIED
>

<!-- IntLink -->
<!-- An element to link to _internal_ resources via XML ID/IDREF -->
<!-- Each Object has an Identifier attribute (type ID) in its Metadata/General element; only this one should be used! -->
<!-- Other less usable Identifier attributes are in Metadata/Meta-Metadata and in Metadata/Resource element; they should be ignored! -->
<!-- In case of Anchor the concerning attribute Id of the Anchor should be used! -->
<!-- note: replaced IDREF by CDATA, IDERF does not work with links to resources outside this document -->
<!ELEMENT IntLink (%linktext;)*>
<!-- TO_IMPLEMENT <!ATTLIST IntLink
	Target CDATA #REQUIRED
	Type (StructureObject | PageObject | MediaObject | Test | TestItem | Glossary | GlossaryItem | Bibliography | Anchor) #REQUIRED
	TargetFrame (Media | FAQ | Glossary | New) #IMPLIED
> -->
<!ATTLIST IntLink
	Target CDATA #REQUIRED
	Type (StructureObject | PageObject | MediaObject | GlossaryItem | RepositoryItem) #REQUIRED
	TargetFrame (Media | FAQ | Glossary | New) #IMPLIED
>

<!-- Anchor -->
<!-- Allows to jump to a specified target point within a page; the use of anchors in ILIAS is equal to its use in HTML-->
<!-- TO_IMPLEMENT <!ELEMENT Anchor (%linktext;)*>
<!ATTLIST Anchor
	Id ID #REQUIRED
> -->

<!-- Markup -->
<!-- Markup element can be used for not supported items; the processing of this element can be adjusted in the XSLT stylesheet -->
<!-- TO_IMPLEMENT <!ELEMENT Markup (%text;)*>
<!ATTLIST Markup
	Type CDATA #REQUIRED
	Attribute1 CDATA #IMPLIED
	Attribute2 CDATA #IMPLIED
	Attribute3 CDATA #IMPLIED
	Attribute4 CDATA #IMPLIED
	Attribute5 CDATA #IMPLIED
> -->

<!-- Test -->
<!-- Only a minimum of functionality defined to support simple multiple choice tests as already known in ILIAS 2-->
<!-- TO_IMPLEMENT <!ELEMENT Test (MetaData, TestItem+)>
<!ELEMENT TestItem (MetaData, Introduction*, Question, Answer+, Hint*)>
<!ELEMENT Introduction (Paragraph | MediaObject)+>
<!ELEMENT Question (Paragraph | MediaObject)+>
<!ELEMENT Answer (Paragraph | MediaObject)+>
<!ATTLIST Answer
	Solution (Right | Wrong) #IMPLIED
>
<!ELEMENT Hint (Paragraph | MediaObject)+> -->

<!-- Question -->
<!ELEMENT Question EMPTY>
<!ATTLIST Question
	QRef CDATA #REQUIRED
>


<!-- Glossary -->
<!-- The Glossary is a container for all GlossaryItems and always part of the LearningModule-->
<!ELEMENT Glossary (MetaData, GlossaryItem+)>
<!--A GlossaryItem consists of MetaData, a term and one or more definitions; it can be referred by PageObjects-->
<!ELEMENT GlossaryItem (GlossaryTerm, Definition+)>
<!ATTLIST GlossaryItem
	Language (%langcode;) #REQUIRED
	Id ID #REQUIRED
>

<!-- GlossaryTerms can be included in Paragraphs -->
<!ELEMENT GlossaryTerm (#PCDATA)>
<!ELEMENT Definition (MetaData, PageContent*)>

<!-- Layout -->
<!-- Layout information for formatting content output different from default layout -->
<!ELEMENT Layout EMPTY>
<!ATTLIST Layout
	HorizontalAlign (Left | Center | Right | LeftFloat | RightFloat) #IMPLIED
	Width CDATA #IMPLIED
	Height CDATA #IMPLIED
>

<!-- Parameter -->
<!-- Special parameters needed for MediaObjects, e.g. a starting class for Java objects; parameters depend on types of MediaObjects -->
<!ELEMENT Parameter EMPTY>
<!ATTLIST Parameter
	Name CDATA #REQUIRED
	Value CDATA #REQUIRED
>
<!-- Bibliography -->
<!ELEMENT Bibliography (BibItem+, Abstract?)>
<!ATTLIST Bibliography
	version CDATA #IMPLIED
	author CDATA #IMPLIED
	created CDATA #IMPLIED
	lastmodified CDATA #IMPLIED
>

<!-- BibItem -->
<!ELEMENT BibItem (Identifier, Language+, Author*, Booktitle, CrossRef*, Edition, Editor*, HowPublished, WherePublished*, Institution*, Journal?, Keyword*, Month?, Pages?, Publisher, School*, Series?, Year, (URL | (ISSN?, ISBN?)))>
<!ATTLIST BibItem
	Type (book | inbook | journalarticle | proceedings | inproceedings | dissertation | phdthesis | mastersthesis | techreport | manual | newspaperarticle | av | internet | unpublished) #REQUIRED
	Label ID #REQUIRED
>

<!ELEMENT Author (FirstName*, MiddleName*, LastName)>
<!ELEMENT Booktitle (#PCDATA)>
<!ATTLIST Booktitle
	Language (%langcode;) #REQUIRED
>
<!ELEMENT CrossRef (#PCDATA)>
<!ELEMENT Edition (#PCDATA)>
<!ELEMENT Editor (#PCDATA)>
<!ELEMENT HowPublished EMPTY>
<!ATTLIST HowPublished
	Type (GreyLiterature | Print | Internet) #REQUIRED
>
<!ELEMENT WherePublished (#PCDATA)>
<!ELEMENT Institution (#PCDATA)>
<!ELEMENT Journal (#PCDATA)>
<!ATTLIST Journal
	Note CDATA #IMPLIED
	Number CDATA #REQUIRED
	Organization CDATA #IMPLIED
>

<!ELEMENT Month (#PCDATA)>
<!ELEMENT Pages (#PCDATA)>
<!ELEMENT Publisher (#PCDATA)>
<!ELEMENT School (#PCDATA)>
<!ELEMENT Series (SeriesTitle, SeriesEditor*, SeriesVolume?)>
<!ELEMENT SeriesTitle (#PCDATA)>
<!ELEMENT SeriesEditor (#PCDATA)>
<!ELEMENT SeriesVolume (#PCDATA)>
<!ELEMENT Volume (#PCDATA)>
<!ELEMENT Year (#PCDATA)>

<!ELEMENT Abstract (#PCDATA)>
<!ELEMENT ISBN (#PCDATA)>
<!ELEMENT ISSN (#PCDATA)>
<!ELEMENT URL (#PCDATA)>

<!ELEMENT LastName (#PCDATA)>
<!ELEMENT FirstName (#PCDATA)>
<!ELEMENT MiddleName (#PCDATA)>