- From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
- Date: Mon, 23 Mar 2015 08:56:53 -0700
- To: RDF Data Shapes Working Group <public-data-shapes-wg@w3.org>
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I think that there are two things to be learned from the state of Shape Expressions. First, none of the implementations of Shape Expressions have much to say to the working group. Implementations of the member submission are ill-founded. Implementations of the axiomatization are unstable and produce counter-intuitive results. Implementations of the regular bag expressions account are for something that is very different from SHACL. Second, recursive shape definitions produce problems. To tame these problems almost certainly requires limiting where recursion can appear. It may be difficult to determine whether the limitations are sufficient. If will probably be difficult to explain these limitations to users. peter -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBAgAGBQJVEDfFAAoJECjN6+QThfjz4AoH/0NIQLBm+EgRdvqusX0ndeGi 11Gm5y1jTiZfLCs0YWHXVOT3JSqwJX626ZuCwYJmDGzQGqw7AZ30hfYHTAZrxAsS y03Bdj2+3NnyPzoWE3VyyBoDkm0W7rSO4oLpVO6PgZHrkZNlsFYdgZ84VLtpmhTv P6Wn82J+/0SfCYaQBgiBffYc6D67v5ML1o/WFl9b4+j6yXHNeIfVZs1ceYBbp1aV 4ZpEr9tQFKOtyAKkeZiMIwVcH+I2iL6h34AXFC50C/tQHX0fdxbCpn53KCO/tbzh M0vQLSWEreishZau0aCRoI/ETkhwT+KtmzNoWSWFajAy6+hbvMTtFXjNK1g0lbc= =q4Xd -----END PGP SIGNATURE-----
Received on Monday, 23 March 2015 15:57:23 UTC