- From: Eddie Robertsson <eddie@allette.com.au>
- Date: Wed, 21 Mar 2001 10:00:08 +1100
- To: "Henry S. Thompson" <ht@cogsci.ed.ac.uk>
- CC: Walt Yao <Walt.Yao@cl.cam.ac.uk>, xmlschema-dev@w3.org
Hi, "Henry S. Thompson" wrote: > > I am implementing a Schema parser w.r.t the 24/10/2000 version, and > > I run into a problem with the definition of a list datatype. As > > specified in 5.1.2, "a list datatype must be derived from an atomic > > or a list datatype, know as the itemType of the list...". > > That's a known typo, will be corrected to 'atomic or _union_ > datatype'. > > Re another reply, you can include a list in a union, but that still > doesn't allow a list of lists -- a union used as the item type of a > list can't contain any lists. I've had I look at the new specification (PR) and it says that a list datatype must be derived from an atomic type: 2.5.1.2 List datatypes "list datatypes are always derived. The value space of a list datatype is a set of finite-length sequences of atomic values. The lexical space of a list datatype is a set of literals whose internal structure is a white space separated sequence of literals of the atomic datatype of the items in the list (where whitespace matches S in [XML 1.0 (Second Edition)])." My interpretation is that a list type must be derived from atomic types only and not atomic or union types. Is this correct? Cheers, /Eddie
Received on Tuesday, 20 March 2001 18:00:48 UTC