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4. Reading business objects (BO)

Read BOs via REST – /bos, meta information and lists with offset/chunkSize/orderBy/search.

REFERENZ DEVELOPER UPDATED: JUL 2026 APPLIES TO NUCLOS 4.2026.X

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The entry point is /bos – an overview of all readable BOs (applying the user's permissions). Each BO offers the links boMeta and bos.

Meta information

/boMetas/{boMetaId} returns a BO's attributes and data types. For creating records the defaultGeneration link is important (see create BO).

/bos/{boMetaId} returns a JSON array under the key bos (the first 40 records). The result can be controlled via request parameters:

Parameter	Description	Default
offset	start index of the list.	0
chunkSize	number of BOs (max. 10,000).	40 (or 5000 for /subBos)
orderBy	SQL-like: `boAttrId asc/desc`, comma-separated.	id desc
search	text search across the displayed attributes (see `fields`).	–
searchFilterId	applies a saved search filter.	–

No QueryProvider

A full QueryProvider as in the API rules is not (yet) available here – use the parameters above.

Create.

Modify.