System element

A system element is the functionality supported by a device. For example, a server is a device. When this server runs a specific set of applications, it becomes a web server. The web server is the system element. The parent service component is a complete application system that depends on the web server (a system element) to make the actual service available to an end user.

Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Each service component contains zero or more system elements.

Each system element contains zero or more devices.

Each system element can support zero or more service components.

For example, an application server and web server are necessary to support an online book ordering system. A database is also essential to store customer and order information captured in the online book ordering system.

Example:

Store (category)

Book Store (service definition)

Buy new book (actual service)

...

Buy used book (actual service)

Orders application (service component)

...

Catalog application (service component)

JBoss application server (system element)

IIS web server (system element)

Shipment application (service component)

...

CD Store (service definition)

...

In this example there are two system elements contained in the Catalog application. Each system element is defined by a record that is related to the subordinate device records.

Note This example also shows how a service component can also depend on an actual service (Database services) that has its own service component (a database application) and system elements (Oracle instances).