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Page properties

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1		-== A document based model ==
	1	+= A document based model =
2	2
3	3	Probably the most important concept of the REQUEA platform is the concept of Entity.
4	4
...	...	@@ -9,4 +9,61 @@
9	9	* relationship definitions for complex entity structures
10	10	* database or XML mapping information.
11	11
12		-== Properties ==
	12	+= Properties =
	13	+
	14	+Entity properties describe the information you want to store for an entity. Properties have a type and based on this type, there may be some additional attributes.
	15	+
	16	+Possible simple types are:
	17	+
	18	+- String
	19	+- Integer (32 bits)
	20	+- Number (double)
	21	+- Boolean (true / false)
	22	+- Date
	23	+- Date and Time (Timestamp)
	24	+- Time (in milliseconds)
	25	+- Logical duration (duration + unit like business days). Note that logical durations may be related a calendar. See [[Manage Calendars and time>>Calendar]]
	26	+- XML
	27	+- Binary data (BLOB)
	28	+- Image
	29	+- Multimedia Audio (such as MP3)
	30	+- Script (Server side javascript)
	31	+- Monetary Amount
	32	+- HTML (rich text)
	33	+- Chart
	34	+- Color (RGB)
	35	+- Security Key (for security settings): see [[Security>>Security]]
	36	+- Geometry (if the database is spatially enabled): see [[Spatial Extensions>>SpatialExtensions]]
	37	+
	38	+In addition to those simple types, there are Relational types such as:
	39	+- [[Component>>Component]]
	40	+- [[Extension>>Extension]]
	41	+- [[Reference>>Reference]]
	42	+- [[Hierarchy>>Hierarchy]]
	43	+- [[File attachments>>FileAttachment]]
	44	+
	45	+Those relational properties are used to describe relationships between entities.
	46	+
	47	+
	48	+
	49	+
	50	+= Inheritance and the Object Model =
	51	+
	52	+Entity definitions describe what your objects should look like. Instances are actual objects in the database.
	53	+
	54	+Entities definitions can inherit from a parent entity:
	55	+
	56	+- a derived entity will have all the properties of the parent plus its own properties
	57	+- a derived entity may add or redefine some specific behavior (like rules, security, ...)
	58	+
	59	+
	60	+= Creating a simple Entity =
	61	+
	62	+To create an entity definition
	63	+- Go to the Tab Design
	64	+- Select Entities / New Entity
	65	+- Follow the wizard (default options)
	66	+- Warning: SQL short name is a 3-5 letters used in DB (For example Ticket would be TCK). It does not have to be unique.
	67	+- Click on submit
	68	+- Look at the log in tomcat output see table creation
	69	+- Go to: http://localhost:8080/dysoweb/do/prefixEntity