In this section, you will find a description of the database schema used by the CoreMedia CMS system. The Content Server analyzes the content types file and automatically creates the database schema from it.
Resource tables
The following tables hold information concerning resources:
<documenttypename>: This table has the name of the corresponding content type.resources: Holds information for each resource existing in the CoreMedia system.
Property tables
The following tables hold information concerning properties:
blobs: Connectsblobdatawith the content type table.blobdata: Contains the actual blobs content in aLONG RAWcolumn.texts: Connectssgmldataandsgmltextwith the content type table.sgmldata: Contains markup data of an XML property.sgmltext: Contains actual text data of an XML property.linklist: Connects the content item which links with the item to which it links.
User Management
The following tables hold information for the user management:
cmusers: Contains the user data.cmgroups: Contains the group data.cmusergroup: Connects users with groups.cmrules: Contains the rules of user groups.
The <documenttypename> table
The Content Sever creates the following columns for each property of the described type. Properties which are inherited are defined in the parent content type table and in all inheriting content type tables. Therefore, you have to change the table of the parent type and the tables of each subtype if you change a property of the parent type.
IntProperty: Column of typeNUMBER(10)with the name of the property.StringProperty: Column of typeVARCHAR(<UTF-8 length>). The UTF-8 length results from the length defined via thelengthattribute of theStringPropertymultiplied by an UTF-8 weight. By default, this factor is three. See Section 4.1, “Properties” for a description of the UTF-8 length.DateProperty: Column of typeDATEwith the name of the property and another column of typeVARCHAR(30)with the name<PropertyName>_tz.
In addition, each content type table contains the following system attributes:
| Attribute | Description |
|---|---|
| ID_ | Unique ID of the content item. Attribute is never null. |
| VERSION_ | Version of the content item. Attribute is never null. |
| ISAPPROVED_ | Marker if this version of the content item is approved ("1") or not ("0"). |
| ISPUBLISHED_ | Marker if this version of the content item is published ("1") or not ("0"). |
| EDITORID_ | User ID of the editor. |
| APPROVERID_ | User ID of the approver. |
| PUBLISHERID_ | User ID of the publisher. |
| EDITIONDATE_ | Date of the last change. |
| APPROVALDATE_ | Date of the approval. |
| PUBLICATIONDATE_ | Date of the publication |
Table 4.7. System attributes of the content type table
The primary key of the content type tables consists of the ID_ and VERSION_ columns.
There exists a foreign key connection to the resources table via the ID_ column.
The blobdata table
The primary key of the blobdata table consists of the following properties:
DocumentId: ID of the content item which contains the blob.DocumentVersion: Version of the content item which contains the blob.PropertyName: Name of the property which contains the blob.
The linklists table
The primary key of the linklists table consists of the following properties:
SourceDocument: ID of the content item which links to the other document.SourceVersion: Version of the content item which links to the other document.PropertyName: Name of the property which contains the link list.LinkIndex: Position of the link in the link list.
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