What does cardinality for node stand for?

[Former Member]

Hi all,

Im very new to ABAP web dynpro.just started building some sample applications.Can anybody explain me what is the meaning of CARDINALITY for node.What do the different values for cardinality of a node mean?How do I know when to choose what cardinality for the node when creating the node?PLease can anyone explain with proper examples.

Thanks.

BR,

SRM tech

[thomas_jung · Accepted solution]

Cardinality is explained pretty well in this online help article:

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/47/45641e80f81962e10000000a114a6b/frameset.htm

[Former Member]

Thanks Thomas for the quick reply.

I have not worked previosuly on ABAP Objects so not able to understand some of the terminologies of WEB DYNPRO ABAP.The link you mentioned summarises the meaning of different options available for CARDINALITY.However I didnt understand the meaning of INSTANTIATION.

Can you explain with an example.

[thomas_jung]

Instantiation is general OO concept and means the creation of a instance of a class. Here is a pretty good article from Wikipedia that explains some of the OO terminology http://en.wikipedia.org/wiki/Object_(computer_science)