Martin Bjorklund je 25.11.2015 ob 11:16 napisal:
Ladislav Lhotka <lho...@nic.cz> wrote:
Hi,
I'd like to resolve this issue. Here is a complete example (valid, I believe):
module context {
namespace "http://example.com/context";;
prefix ctx;
leaf foo {
config false;
type uint32;
}
rpc oper {
output {
must "/foo mod foo = 0";
leaf foo {
type uint32;
}
}
}
}
1. What does the accessible tree look like?
Note that the anser to this depends on the outcomne of Y04. Andy has
strong objections to Y04-02, and proposed Y04-04 instead.
Assuming Y04-02, and assuming /foo has the value 20 and the oper rpc's
result has foo = 10, the accessible tree would look like this:
<root>
+-- oper
| +-- foo = 10
+-- foo = 20
(If we instead move back to Y04-04, the accessible tree would be:
<root>
+-- oper
+-- foo = 10
)
2. What is the context node for the "must" expression?
/oper
This change to the accessible tree (1.0 --> 1.1) may break some existing
"when" XPath expressions (those under "output" statement). Is this
compatible with 1.1 charter - "All compliant YANG 1.0 modules must be
accepted as compliant YANG 1.1 modules"?
rpc my-rpc {
output {
uses my-stuff {
when "specific-param = 'foo'";// 1.0
// when "my-rpc/specific-param = 'foo'" // 1.1
}
leaf specific-param {
type string;
}
}
}
Jernej
/martin
Thanks, Lada
Martin Bjorklund <m...@tail-f.com> writes:
Ladislav Lhotka <lho...@nic.cz> wrote:
Hi,
Y02-01 allows "must" as a substatement of "input", "output" and
"notification" but for these cases the specification of the context
node in sec. 7.5.3 doesn't work.
o The context node is the node in the accessible tree for which the
"must" statement is defined.
You are right. But note how the accessible tree is defined. There is
a node for the operation / notification. This node should be the
context node:
o If the "must" statement is a substatement of a "notification"
statement, the context node is the node representing the
notification in the accessible tree.
o If the "must" statement is a substatement of a "input"
statement, the context node is the node representing the
operation in the accessible tree.
o If the "must" statement is a substatement of a "output"
statement, the context node is the node representing the
operation in the accessible tree.
/martin
--
Ladislav Lhotka, CZ.NIC Labs
PGP Key ID: E74E8C0C
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