Data Object Types

Macros
#define	DS_CONTAINER_TYPE   228
	Define the container data type. More...
#define	DS_GENERIC_TYPE   231
	Define the generic object data type. More...
#define	DS_JSON_TYPE   232
	Define the JSON object data type. More...
#define	DS_NEWS_TYPE   223
	Define the news headline data type. More...
#define	DS_PAGE_TYPE   221
	Define the page data type. More...
#define	DS_PERMISSION_TYPE   230
	Define the permission data type. More...
#define	DS_RECORD_TYPE   222
	Define the record data type. More...
#define	DS_RECORD_TYPE2   225
	Define the type 2 record (market depth) data type. More...
#define	DS_RECORD_TYPE3   226
	Define the type 3 record (history) data type. More...
#define	DS_STORY_TYPE   224
	Define the news story data type. More...

Detailed Description

A data object can represent any kind of data that can fit into the the basic structure of a subject with a number of field/value pairs. There are various pre-defined types typically used, these are described below. Other types can be used as long as the receiving DataSource will understand them. The type is set when the object is is created with ds_init_data(). There are some object type specific convenience functions which may set the type for you, for example ds_page_init().

Directory

A directory is both an object and a container for other objects. Directories can be used as a means of organising information into groups and hierarchies.

Page

A page is a free format piece of text made up of rows. Typical sizes are 14 rows of 64 characters and 25 rows of 80 characters.

Record

A record (or "logical record") is a means of storing and displaying information. Records are composed of fields which may not be of the same type: for example, a record containing equity data could have several price fields (e.g. the last traded prices) together with time and date fields, whereas an index record would have a price field but no bid or ask values.

See also

Record Data Types

Publishing Record Data

Publishing Page Data

Publishing News

Publishing Container Objects

Publishing Permission Objects

Macro Definition Documentation

#define DS_CONTAINER_TYPE   228

Define the container data type.

#define DS_GENERIC_TYPE   231

Define the generic object data type.

The generic object type uses dynamic fields which do not need to be defined in fields.conf

#define DS_JSON_TYPE   232

Define the JSON object data type.

#define DS_NEWS_TYPE   223

Define the news headline data type.

#define DS_PAGE_TYPE   221

Define the page data type.

#define DS_PERMISSION_TYPE   230

Define the permission data type.

#define DS_RECORD_TYPE   222

Define the record data type.

#define DS_RECORD_TYPE2   225

Define the type 2 record (market depth) data type.

#define DS_RECORD_TYPE3   226

Define the type 3 record (history) data type.

#define DS_STORY_TYPE   224

Define the news story data type.