SIA20Err1 < IVOA

IVOA Web>IvoaDAL>SIAP_2-0_Errata>SIA20Err1 (2023-04-05, JamesDempsey) (raw view)

---+ !Simple Image Access version 2.0 Erratum 1: POS=RANGE examples inconsistent with spec

Author: François Bonnarel

Date last changed: 2023-01-24

Date accepted: 2023-04-05

---++ Rationale

In section  2.1.1, two RANGE examples display RANGE limits with either Inf or -Inf, + Inf. This is inconsistent with the spec which states that RA is in [0, 360] and DEC in [-90,90] and that no RANGE reduction should be required from SIA services implementations.

This bug orignally described on github in SIA issue #5 (https://github.com/ivoa-std/SIA/issues/5)

---++ Erratum Content

This Erratum proposes following changes.

---++++ Fix RANGE syntax

In [[http://ivoa.net/documents/SIA/20151223/REC-SIA-2.0-20151223.html#toc12][§2.1.1 "*POS*"]] of !SIA-2.0,

update the RANGE example for the North Pole from

from
<verbatim>POS=RANGE 0 360.0 89.0 +Inf</verbatim>

to
<verbatim>POS=RANGE 0 360.0 89.0 90.0</verbatim>

and fix the RANGE example for the whole sky

from
<verbatim>POS=RANGE -Inf +Inf -Inf +Inf</verbatim>

to
<verbatim>POS=RANGE 0 360 -90 +90</verbatim>

---++ Impact Assessment

Fixing the RANGE syntax in an example will make no harm to any service and will avoid application implementers writing code requesting incorrect queries.

Topic revision: r3 - 2023-04-05 - JamesDempsey

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