Documentation of the information model for
DiversityDescriptions (1.7)

This document contains a complete list of all entities and attributes used in the information model of this application module. It is primarily intended as a technical reference. It can also be helpful, however, in understanding the scope and usage of certain attributes. When you have a question like 'where does this information fit in', reading the attribute description of related attributes may help you.

Besides the human readable documentation provided below, three more technical documents are provided:

Index of entities: DELTA_CS, DELTA_ITEM, DescriptorProject, DescriptorProject_ParameterSet, DELTA_CHAR, DELTA_CHAR_Heading, DELTA_CHAR_Heading_Link, DELTA_DEP, DELTA_DESCR, DELTA_Glossary, DELTA_MOD, DELTA_MOD_Link, DELTA_PROPERTY, DELTA_ReportElement, DELTA_RSC.

DELTA_CS

Descriptor project: Character states for each character.

Attributes and indices of the entity 'DELTA_CS'
Name Type Description / Default value & validation Rqrd./Index
SID Autonumber State ID. - I (U)
CID Integer Character ID. R I (UM)
CS Text (16) Character state code. Usually pos. integer number or special codes for variable/unknown and for statistics (mean etc.). R I
CharStateName Text (255) Name or description of character state. R I
StateWording Text (255) Wording to be used instead of CharStateName for natural language descriptions output. - -
Notes Memo Internal character state notes. - -
StateFormatString Text (255) State specific formatting, overriding FormatString defined in the character definition. Standard Basic formatting string like "#.0". - -
Implicit Boolean Mark this state as a default which is automatically set.
Default value: 0
R -
UseEdit Boolean Use this state during entering or updating of item descriptions.
Default value: -1
- -
UseIdentify Boolean Use this state during interactive identification.
Default value: 0
- -
UseDescr Boolean Use this state for natural language item descriptions.
Default value: 0
- -
UsePhylo Boolean Use this state for phylogenetic analysis.
Default value: 0
- -
UseOther Boolean Use this to define a character state set for user-defined purposes.
Default value: 0
- -
MinValue Double Numeric characters only: The lowest value of X in an item description to be mapped to this state (inclusive).
Default value: -1E+308
R -
MaxValue Double Numeric characters only: The highest value of X in an item description to be mapped to this state (inclusive).
Default value: 1E+308
R -
StateWording1 Text (255) First part of the wording used instead of CharStateName for natural language item descriptions output. Output once in front of all states where this wording occurs in a single item. - -
StateWording2 Text (255) Second part of the character state wording. This part is always output for each state. Note that any of the three parts of the state wording may be left empty! - -
StateWording3 Text (255) Second part of the character state wording. This part is output only once after all states where this wording is identical within the same item. Example: StateWording1 = 'not', 'weakly', 'strongly'; StateWording2 = 'hairy'; ® 'weakly or strongly hairy'. - -
StateWordingSuppressSingle Boolean If true, the state wording is suppressed if it occurs singly in an item. It is assumed to be implicit. Example: 'absent' alone could be suppressed, but if if two states have been scored, 'absent or present' would be output. - -
Index name:  Attributes & index properties
CharStateName:  CharStateName (Duplicates OK)
CID:  CID; CS (Unique values)
CS:  CS (Duplicates OK)
SID:  SID (Primary key; Unique values)

DELTA_ITEM

Descriptor project: Item or taxon table.

Attributes and indices of the entity 'DELTA_ITEM'
Name Type Description / Default value & validation Rqrd./Index
IID Long Item ID.
Validation rule: >0
R I (U)
ItemName Text (255) Name or description of item (incl. taxon authors if necessary), link to taxonomic subsystem. R I
ItemWording Text (255) Natural language descript.: Wording to be used instead of ItemName. - -
Notes Memo Item notes. - -
Abundance Single Abundance, relative importance (or weight) of item, 1-10, default is 5.
Default value: 5
R I
CollUnit Text (255) Unit code in specimen collection, link into collection subsystem. NOT DEFINED IN DELTA! - I (N)
LitRef Text (255) Literature reference (user-readable text form). NOT DEFINED IN DELTA! - I (N)
LitKey Long Literature reference (numeric link into literature reference subsystem). NOT DEFINED IN DELTA! - I (N)
LitRefDetail Text (255) Reference detail, like page(s) of interest, specific figures, etc. - -
Index name:  Attributes & index properties
Abundance:  Abundance (Duplicates OK)
CollUnit:  CollUnit (Duplicates OK; Ignore Nulls)
IID:  IID (Primary key; Unique values)
ItemName:  ItemName (Duplicates OK)
LitKey:  LitKey (Duplicates OK; Ignore Nulls)
LitRef:  LitRef (Duplicates OK; Ignore Nulls)

DescriptorProject

Overview over all descriptor projects available in the current application.

Attributes and indices of the entity 'DescriptorProject'
Name Type Description / Default value & validation Rqrd./Index
PID Autonumber Descriptor project ID. - I (U)
ProjectName Text (20) The name of the project used by the application, also the prefix of all project tables. - I (U)
ParentPID Long Only for linked subprojects: The project containing the main tables. - I
ProjectTitle Text (50) A short title for the project (up to 50 characters). R I (U)
ProjectTitleURL Text (255) A URL that may optionally be placed behind the Title to hyperlink to another site on the world-wide-web. - -
ProjectTitleAligment Byte Default horizontal alignment of title text: 0 = left; 1 = centered; 2 = right; 3 = justified (block).
Default value: 0
- -
ProjectDescription Text (255) A short descriptive text, explaining the scope of the descriptor project (used in reports). - -
ProjectVersion Text (255) A version number or code for the descriptor definition and item data of the project. - -
ProjectAuthors Text (255) A string containing one or several authors responsible for the data in the descriptor project. - -
ProjectEditors Text (255) A string containing one or several editors responsible for the data in the descriptor project. - -
ProjectCopyright Text (255) A string containing a copyright statement, including the year (do include the copyright symbol, (c) or ©, if you want to use it). - -
ProjectHistory Memo History of the project, including data source information, copyright agreements, acknowledgements, occasional collaborators, and disclaimers. - -
ProjectHistoryNotes Memo Internal notes and additions to the history. In contrast to ProjectHistory this information is not used in reports. - -
ProjectImportNotes Memo Messages issued during the import of the project (import source, import warnings, import skipped information). - -
ProjectNotes Memo Internal notes regarding the entire project. - -
ProjectLogo Text (255) A logo or icon, usually a small gif file that can be displayed side-by-side with the project title. - -
ProjectLogoURL Text (255) A URL that may optionally be placed behind the Logo to hyperlink to another site on the world-wide-web. - -
ProjectLogoAligment Byte Default alignment of project logo: 0 = on left side of title; 2 = on right side of title; 17 = centered above title; 33 = centered below title.
Default value: 0
- -
ProjectStylesheetURL Text (255) URL of a CSS (cascading style sheet) file to create a consistent format for html reports. - -
ProjectDisclamer Text (255) Text placed at the bottom of reports, containing a disclaimer or other information. - -
ProjectDisclamerURL Text (255) A URL that may optionally be placed behind the Disclaimer to hyperlink to another site on the world-wide-web. - -
ProjectDisclamerAligment Byte Default horizontal alignment of disclaimer text: 0 = left; 1 = centered; 2 = right; 3 = justified (block).
Default value: 0
- -
ProjectLastBackup Text (255) Date and file name of last backup to an mdb backup file. - -
ProjectLastRestore Text (255) Date and file name of last restore from an mdb backup file. - -
ProjectLastExport Text (255) Date and file name of last export, e. g., to a DELTA file. - -
ProjectLastSchemaUpdate Date/Time The date at which the project schema (character, state, and modifier definitions) were last edited
MUST CURRENTLY BE UPDATED MANUALLY TO AVOID ADDING UPDATE CODE AT MANY MANY POINTS.
- -
ProjectLastItemUpdate Date/Time The date at which the item definition and description were last edited
MUST CURRENTLY BE UPDATED MANUALLY TO AVOID ADDING UPDATE CODE AT MANY MANY POINTS.
- -
StorageModelVersion Text (10) An internal string defining the version of the data model in which the project data are currently stored. This attribute is only relevant for restore operations (which can operate on active projects as well as on explicit backups). - -
ProjectTextFormatting Text (255) Formatting encoding of data in the project (0=Plain/BasicHTML, 1= Full HTML), list of coding for item, heading, char. etc. - -
Index name:  Attributes & index properties
ParentPID:  ParentPID (Duplicates OK)
PID:  PID (Primary key; Unique values)
ProjectName:  ProjectName (Unique values)
ProjectTitle:  ProjectTitle (Unique values)
Relation type:  Fields involved
Deletions cascade  DescriptorProject.PID « DescriptorProject_ParameterSet.PID

DescriptorProject_ParameterSet

Parameter set (Character definition, Natural language, HTML form reports, etc.) for descriptor projects.

Attributes and indices of the entity 'DescriptorProject_ParameterSet'
Name Type Description / Default value & validation Rqrd./Index
PID Long Descriptor project ID. R I/I/I (UM)
ObjectName Text (40) The reporting or other object to which the parameter set applies, e.g. the Character definition report. R I
SetName Text (50) A user defined name distinguishing multiple parameter sets for the same object.
Default value: "Default"
R I
LastUpdate Date/Time The date at which the parameter set was last edited. - -
Notes Memo Internal notes regarding the parameter set. - -
Parameters Memo The coded parameter set (machine readable). - -
OverrideHeaderFile Memo Precalculated. - -
OverrideFooterFile Memo   - -
CalculatedHeaderText Memo   - -
CalculatedFooterText Memo   - -
InsertHeaderFile Memo Precalculated. - -
InsertFooterFile Memo   - -
UseHeaderOverride Text (255)   - -
Index name:  Attributes & index properties
DescriptorProject_ParameterSetPID:  PID (Duplicates OK)
DescriptorProjectDescriptorProject_ParameterSet:  PID (Duplicates OK)
Name:  SetName (Duplicates OK)
Object:  ObjectName (Duplicates OK)
PID:  PID; ObjectName; SetName (Primary key; Unique values)
Relation type:  Fields involved
Deletions cascade  DescriptorProject.PID « DescriptorProject_ParameterSet.PID

DELTA_CHAR

Descriptor project: Character table.

Attributes and indices of the entity 'DELTA_CHAR'
Name Type Description / Default value & validation Rqrd./Index
CID Integer Character ID number.
Validation rule: >0
R I (U)
CharName Text (255) Short name of character. R I (U)
Unit Text (255) For numeric characters: an optional measurement unit like 'mm'. Only true units here, text like 'wide' belongs to CharWording2! - -
Notes Memo Character notes. - -
Type Text (2) Type of character: Text, Ordered/unordered multistate, Integer/Real numeric.
Default value: "UM"; Validation rule: "UM" Or "OM" Or "IN" Or "RN" Or "TE"
R I
Mandatory Boolean Is the scoring of this character mandatory (required) in each item?
Default value: 0
R -
MultiStateType Byte Are multiple states allowed and how are they interpreted?
Default value: 1; Validation rule: >-1 And <5
R I
Reliability Single Reliability (or weight) of character for identification, 1-10, default is 5.
Default value: 5; Validation rule: (>=0 And <=32) Or Is Null
R -
Availability Single Availability (or accessibility) of character for identification, 1-10, default is 5. This is an extension to the Delta standard.
Default value: 5; Validation rule: (>=0 And <=32) Or Is Null
R -
Fuzziness Single For identification: Unless a range is explicitly present, used to form a range around the mean (RN/IN) or state (OM).
Default value: 0; Validation rule: >=0
R -
FuzzinessIsPercent Boolean Interpret 'Fuzziness' as 'percent' rather than 'absolute value' (e.g. Fuzziness=10 ® range=mean ± 10%, instead of ± 10 absolute).
Default value: 0
R -
KeyStates Text (255) For use in a key: combine multistate char, into new combinations or define ranges for numeric char. - I
CharHeading Integer A heading defined in the headings definition, inserted in char. def. output in front of the current character. - I (N)
HeadingLink Integer A heading defined in the headings definition, inserted in natural language descriptions in front of descriptions using this character. - I (N)
CharWording Text (255) Natural language descript.: Wording to be used instead of CharName. - -
CharWording2 Text (255) Natural language descript.: Wording to be used AFTER states or values + unit, e.g. 'wide' for 'leaves 3-5 mm wide'. - -
UnitIsPrefix Boolean True if unit is to be placed in front of value, e.g. "pH 7.2". - -
FormatString Text (255) Default formatting for all states (compare StateFormatString). Esp. for numeric values (number of decimal places etc.). Standard Basic formatting string like "#.0". - -
ParagraphLink Long Nat.language descript.: Define char. linked into a single paragraph. A new paragraph starts if group ID changes.
Default value: 1; Validation rule: >0 Or Is Null
- -
SentenceLink Long Nat.language descript.: Define char. linked into a single sentence. A new sentence starts if group ID changes or whenever 'Null'.
Validation rule: >0 Or Is Null
- -
CommaLink Long Nat.language descript.: Define characters linked into a comma-enumeration ('sub-sentence'). A new group starts if group ID changes or whenever 'Null'.
Validation rule: >0 Or Is Null
- -
SpecialLink Long Nat.language descript.: Define characters that are linked by special means (as defined in SpecialElement).
Validation rule: >0 Or Is Null
- -
SpecialElement Long Nat.language descript.: SpecialLink is rendered using this ReportElement (concatenation: char. separated only by blank, multi-char. formula/equation or table definition) [Denormalized n:m relation b/w Char.SpecialLink & ReportElement.ReportElement].
Validation rule: >9 Or Is Null
- -
UseComma2 Boolean Nat.language descript.: Use alternative comma separator between states of this character (e.g. for Chinese). - -
OmitFinalComma Boolean Nat.language descript.: The final comma between character states is omitted ('1,2 and 3' instead of '1,2, and 3').
Default value: 0
R -
OmitValues Text (1) Natural language descript.: Omit lower ('-') or upper ('+') part of numeric character ranges.
Validation rule: Is Null Or '+' Or '-'
- -
Emphasize Boolean Nat.language descript.: Emphasize (italic or bold print) this character in all items.
Default value: 0
- -
OmitPeriod Boolean Nat.language descript.: Omit the end delimiter (usually the period for a sentence, DELTA: 'OMIT PERIOD FOR CHAR').
Default value: 0
- -
NumStates Integer Number of states for this character, default is 2. Calculated automatically, do not edit!
Default value: 2
R I
Index name:  Attributes & index properties
CharHeading:  CharHeading (Duplicates OK; Ignore Nulls)
CharName:  CharName (Unique values)
CID:  CID (Primary key; Unique values)
HeadingLink:  HeadingLink (Duplicates OK; Ignore Nulls)
KeyStates:  KeyStates (Duplicates OK)
MultiStateType:  MultiStateType (Duplicates OK)
NumStates:  NumStates (Duplicates OK)
Type:  Type (Duplicates OK)

DELTA_CHAR_Heading

Descriptor project: Character heading/Identification/HeadingLink table.

Attributes and indices of the entity 'DELTA_CHAR_Heading'
Name Type Description / Default value & validation Rqrd./Index
HID Integer Character heading ID; determines sequence of headings when used in identification; change number to change that sequence!
Validation rule: >0, validation message: You must use integer numbers greater than zero.
R I (U)
HeadingName Text (255) Heading name, used for CharHeadings and Named character groups (identification). R I (U)
HeadingWording Text (255) Optional wording; preferred over HeadingName as HeadingLink in natural language output. - -
Notes Memo Internal notes (not exported to Delta format). - -
AutoGroup Text (255) Empty for user defined headings; else special code which is recognized during identification or a SQL queryreturning a set of character IDs. (HeadingName of predefined AutoGroups may be changed!). - -
Index name:  Attributes & index properties
HeadingName:  HeadingName (Unique values)
HID:  HID (Primary key; Unique values)

DELTA_CHAR_Heading_Link

Descriptor project: Character groups for Identification, Linking.

Attributes and indices of the entity 'DELTA_CHAR_Heading_Link'
Name Type Description / Default value & validation Rqrd./Index
HID Integer Character heading ID to be linked.
Validation rule: >0, validation message: You must use integer numbers greater than zero.
R I (UM)
CID Integer Character ID to which the identification heading is applicable. R I
Index name:  Attributes & index properties
CID:  CID (Duplicates OK)
HID:  HID; CID (Primary key; Unique values)

DELTA_DEP

Descriptor project: Dependent (= inapplicable) characters for each character state.

Attributes and indices of the entity 'DELTA_DEP'
Name Type Description / Default value & validation Rqrd./Index
CID Integer Controlling character ID. R I (UM)
CS Text (16) Controlling character state. R -
InapplicableCID Integer CID of dependent character, i.e. inapplicable for any item where current CID/CS combination is used. R I
Index name:  Attributes & index properties
CID:  CID; CS; InapplicableCID (Primary key; Unique values)
InapplicableCID:  InapplicableCID (Duplicates OK)

DELTA_DESCR

Descriptor project: Data/descriptions for each item.

Attributes and indices of the entity 'DELTA_DESCR'
Name Type Description / Default value & validation Rqrd./Index
IID Long Item ID. R I
CID Integer Character ID. R I (UM)
Modifier Text (255) Modifier wording for categorical or numerical data, e.g. "mostly", "usually", "rarely". - -
CS Text (16) Character state code. Usually pos. integer number or special codes for variable/unknown and for statistics (mean etc.). R I
X Double Numeric value, defined by CS. - I (N)
TXT Memo Text data. - -
Notes Memo Notes and additional information, included in natural language item descriptions. - -
SEQ Long Sequence of character states for the item. - I
Index name:  Attributes & index properties
CID:  CID; CS; IID (Primary key; Unique values)
CS:  CS (Duplicates OK)
IID:  IID (Duplicates OK)
SEQ:  SEQ (Duplicates OK)
X:  X (Duplicates OK; Ignore Nulls)
Table validation rule:  (Not IsNull([TXT]) And IsNull([X]) And [CS]='TE') Or (IsNull([TXT]) And (IsNull([X]) Or Not IsNull([X]) And Not IsNumeric([CS])))
Table validation text:  You may not enter data in both TXT and X, use only one of them! To enter TXT data, use CS='TE', to enter numeric data use the appropriate CS attributes.

DELTA_Glossary

Preliminary, for testing purposes only.

Attributes and indices of the entity 'DELTA_Glossary'
Name Type Description / Default value & validation Rqrd./Index
GID Autonumber Glossary ID. - I (U)
Entry Text (255) Glossary entry (basic xhtml formatting allowed). R I (U)
Definition Memo Glossary entry definition (basic xhtml formatting allowed). R -
Notes Memo Internal notes. - -
Keywords Text (255) Additional keywords (semicolon separated list). - -
Index name:  Attributes & index properties
Entry:  Entry (Unique values)
GID:  GID (Primary key; Unique values)

DELTA_MOD

Descriptor project: Modifer wordings for categorical or numerical data.

Attributes and indices of the entity 'DELTA_MOD'
Name Type Description / Default value & validation Rqrd./Index
Usage Text (255) Type of characters for which the modifier is applicable, e.g. GENERAL. COLORS, FREQuency of occurrence. R I
Modifier Text (255) Modifier wording for categorical or numerical data, e.g. "mostly", "usually", "rarely". R I (U)
Reliability Byte Influence of modifier on data coded through categorical/numerical char. states. More (>5) or less reliable (<5); 5 is default.
Default value: 5; Validation rule: (>=0 And <=32) Or Is Null
R -
Postfix Boolean Checked = output after the character state wording, unchecked = in front of it. R -
UseBlank Boolean Checked = blank is added between the modifier wording and the item data text, else modifier added compress.
Default value: -1
R -
Operator Byte >0 = Override operator, the normal operator between states is omitted when this modifier is encountered, e.g. to insert AND where normal operator would be OR.
Default value: 0; Validation rule: (>-1 And <4) Or 5
R -
Notes Text (255) Internal notes. - -
LowerFreq Single The lower border of the frequency range, for freq. modifiers only.
Validation rule: (>=0 And <=1) Or Is Null
- -
UpperFreq Single The upper border of the frequency range, for freq. modifiers only.
Validation rule: (>=0 And <=1) Or Is Null
- -
Index name:  Attributes & index properties
Modifier:  Modifier (Primary key; Unique values)
Usage:  Usage (Duplicates OK)

DELTA_MOD_Link

Descriptor project: Links between characters and modifiers.

Attributes and indices of the entity 'DELTA_MOD_Link'
Name Type Description / Default value & validation Rqrd./Index
CID Integer Character ID to which the modifier is applicable. R I
Modifier Text (255) Modifier wording for categorical or numerical data, e.g. "mostly", "usually", "rarely". R I (UM)
Index name:  Attributes & index properties
CID:  CID (Duplicates OK)
Modifier:  Modifier; CID (Primary key; Unique values)

DELTA_PROPERTY

Descriptor project: General header information about the project.

Attributes and indices of the entity 'DELTA_PROPERTY'
Name Type Description / Default value & validation Rqrd./Index
PropertyName Text (255) The name of the project property (do not change!). - I (U)
TextValue Memo Text information. Use Shift F2 to zoom into larger window! - -
DateTimeValue Date/Time Date or time information, e.g. of last update. - -
NumericValue Double Numerical information, stored as real number. - I (N)
Index name:  Attributes & index properties
NumericValue:  NumericValue (Duplicates OK; Ignore Nulls)
PropertyName:  PropertyName (Primary key; Unique values)

DELTA_ReportElement

Descriptor project: ReportElements for natural language description formulas, tables, etc.

Attributes and indices of the entity 'DELTA_ReportElement'
Name Type Description / Default value & validation Rqrd./Index
ReportElement Long ID of report element (1-10 are reserved!). - I (UM)
Language Text (2) Language to which the ReportElement is applicable. R -
Description Text (255) Text that describes the use of the report element (shown in user interface). - -
ParagraphBefore Boolean Start a new paragraph before the ReportElement. - -
TextBefore Text (255) Text inserted before the ReportElement (unformatted text). - -
TextBetween Text (255) Enumeration separator between multiple subelements (e.g. characters); used only if ComplexWording is empty! - -
TextAfter Text (255) Text inserted after the ReportElement (unformatted text). - -
ParagraphAfter Boolean Start a new paragraph after the ReportElement. - -
ComplexWording Text (255) Wording for multiple characters, char. are inserted at |1, |2, etc.; |U = Unit, |C new table column, |R new table row. - -
ComplexWordingFormat Byte 0 = RTF; 1 = HTML; 2= unformatted, will be reformatted with character format.
Default value: 2
- -
UseWordingIfIncomplete Boolean Yes: char. missing in an item are replaced by ''; No: AlternativeElement is tried, if none fitting found: EnumSeparator is used. - -
AlternativeElement Long Another ReportElement that is used if not all elements in ComplexWording are present, see 'UseWordingIfIncomplete'. - -
CapitalizeStart Boolean Capitalize first letter at start of this group.
Default value: 0
- -
CapitalizeWithin Boolean Capitalize first letter of each element (each char. in enumeration or table cell).
Default value: 0
- -
WordgTruncation Byte Wording truncation (e.g. char. wording). 0=disable, 1=enable, restart, 2=enable, continue.
Default value: 0; Validation rule: >-1 And <3
R -
RepElementNotes Memo Internal development notes. - -
Index name:  Attributes & index properties
PrimaryKey:  ReportElement; Language (Primary key; Unique values)

DELTA_RSC

Descriptor project: External resources stored as files or URL, e.g. illustrations for characters/items.

Attributes and indices of the entity 'DELTA_RSC'
Name Type Description / Default value & validation Rqrd./Index
IID Long ID of associated item (optional). - I (N)
CID Integer ID of associated character (optional). - I (N)
CS Text (16) ID of associated character state (set to U or TE for text characters if resource belongs to char. in general).
Default value: "U"
- I (N)
Resource Text (255) Filename of illustration (photo/drawing/graph) or other media resources. See _HEADING properties MediaDefaultPath/MediaDefaultURL to set global paths. - I
Caption Memo Caption for the resource, e.g. a text to display while showing an illustration or a video. - -
Notes Memo Internal notes (perhaps also formatting commands for INTKEY). - -
ItemDefault Boolean This image is a default image for the whole item, regardless of character association.
Default value: 0
R -
CharDefault Boolean This image is a default image for the whole character, regardless of character state association.
Default value: 0
R -
RID Autonumber Media resource ID (necessary, because either IID or CID may be missing). - I (U)
ItemDescription Boolean Include the resource, esp. images in the natural language description of items.
Default value: 0
- -
CharDefinition Boolean Include the resource, esp. images in character definition report.
Default value: 0
- -
Index name:  Attributes & index properties
CID:  CID (Duplicates OK; Ignore Nulls)
CS:  CS (Duplicates OK; Ignore Nulls)
IID:  IID (Duplicates OK; Ignore Nulls)
Resource:  Resource (Duplicates OK)
RID:  RID (Primary key; Unique values)

Footnotes: The following abbreviations have been used in the tables: R: It is required to enter data in this field. I: The field is indexed to enable faster searching. Different types of indices are denoted by additional letters in parentheses: U = unique index, N = Null values are ignored in the index, M = the index contains more than one attribute. In the first column the names of attributes that are part of the primary key are underlined.

Data types: 'Text (255)' indicates a text of varying length for which no specific design restrictions have been formulated. 255 characters should be read as a proposed technical maximum limit, that can be changed if required by the database management system. In contrast, 'Memo' is explicitly defined as text of unlimited length.

We are interested in your opinion. If you see any problems with the model that you would like to bring to our attention, please contact us by sending an email to g.hagedorn@bba.de!

Documentation created on 16. Feb. 2001 15:28; last update: 2005-03-30.

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