User defined rule for missing triples

Hi,
i would like to know if there is a way to define a user defined rule for triples that are not contained in a model. With curly brace syntax it could be something like this:
INSERT INTO mdsys.semr_validation_rb VALUES(
'test_rule',
'{?s ?p ?o. OPTIONAL{?s rdf:type ?t}}',
't is null',
'(?s <hasType> "false")',
null);
Unfortunately this is not working. Has anybody a suggestion to solve this problem with user defined rules?

Hi,
This is related to the following post.
built-in primitives(noValue,remove) for user defined rules
Note that there is something you need to pay a bit attention to.
Say your original graph contains
:John :fatherOf :Mary
but not any type classification for :John (i.e. no match for {:John rdf:type ?t})
Assume you add the following triple according to the rule you described
(:John <hasType> "false")
Now, what happens if :John is classified as a :Person (or :Parent, :Father),
do you want to withdraw* :John <hasType> "false"?
Thanks,
Zhe

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Driving processing with user defined rules

Hi,
I am looking for some examples of user defined rules for file processing.
So I have a file loaded in to the application in a staging table, user will want to define rules to process the data and then an output will be created.
Very vague question I know but has anyone got any examples where they did something similar which might help?
Thanks.

Roger,
Here's one that I found that may not look very simple but it actually is if you just break it down piece by piece.
create or replace FUNCTION              "SQL_IP_SUBNET" (
p_octet1 in varchar2,
p_octet2 in varchar2,
p_octet3 in varchar2,
p_octet4 in varchar2,
p_slash in varchar2,
p_status in varchar2)
return varchar2
as
l_select varchar2(1000);
l_octet1 varchar2(200);
l_octet2 varchar2(200);
l_octet3 varchar2(200);
l_octet4 varchar2(200);
l_slash varchar2(200);
l_status varchar2(200);
l_cidr varchar2(50);
l_where varchar2(1000);
l_order_by varchar2(100);
l_sql varchar2(32767);
begin
l_select := q'!select id, get_ip_addr(octet1, octet2, octet3, octet4) ip_addr, slash, description, !';
l_select := l_select || q'! octet1, octet2, octet3, octet4 from poc_subnets where 1=1!';
if (p_octet1 is not null) then
l_octet1 := q'! and octet1=!' || p_octet1;
end if;
if (p_octet2 is not null) then
l_octet2 := q'! and octet2=!' || p_octet2;
end if;
if (p_octet3 is not null) then
l_octet3 := q'! and octet3=!' || p_octet3;
end if;
if (p_octet4 is not null) then
l_octet4 := q'! and octet4=!' || p_octet4;
end if;
if (p_slash is not null) then
if substr(p_slash,1,1) != '/' and length(p_slash) = 2 then
l_cidr := '/'||p_slash;
else
l_cidr := p_slash;
end if;
l_slash := q'! and slash='!' || l_cidr || q'!'!';
end if;
if length(l_octet1) > 0 then
l_where := l_octet1;
end if;
if length(l_octet2) > 0 then
l_where := l_where || l_octet2;
end if;
if length(l_octet3) > 0 then
l_where := l_where || l_octet3;
end if;
if length(l_octet4) > 0 then
l_where := l_where || l_octet4;
end if;
if length(l_slash) > 0 then
l_where := l_where || l_slash;
end if;
if length(p_status) > 0 then
case
when p_status = 'YES' then
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when p_status = 'NO' then
   l_status := q'! and assigned = 'NO'!';
else
   l_status := null;
end case;
end if;
if length(l_status) > 0 then
l_where := l_where || l_status;
end if;
-- do the order by clause
l_order_by := q'! order by octet1, octet2, octet3, octet4!';
if length(l_where) > 0 then
l_sql := l_select||l_where||l_order_by;
else
l_sql := l_select||l_order_by;
end if;
return l_sql;
end;
Just so you know, this is not necessarily the best way to do what you're asking. It does get the job done however.
If you inspect the code it's basically just a bunch of string concatenation operations based on the presence or absence of each of the input parameters. Pretty much what you were asking about.
Earl

How to use negation in user defined rules?

Hi,
Can you please show me an example to use negation in user defined rule? I created a rule like below (the rule says if a patient has a fever problem and not have penicillin hypersensitivity, then recommend medication1):
INSERT INTO mdsys.semr_myMedicineRB VALUES('rule1',
'(?p rdf:type :Patient) (?p :present ?c1) (?c1 rdf:type :Fever) (?c2 rdf:type :Penicillin_Hypersensitivity)',
'(NOT_EXISTS(p :present c2))',
'(?p :recommendation :medication1)',
SEM_ALIASES(SEM_ALIAS('','http://www.example/medicine#')));
The rule successfully inserted into the rulebase. However, I cannot pass the entailment creation phase and got the errors:
ORA-29532: Java call terminated by uncaught Java exception: java.sql.SQLException: Missing IN or OUT parameter at index:: 1
ORA-06512: at "MDSYS.SDO_SEM_INF_INTERNAL", line 16453
ORA-06512: at "MDSYS.SDO_SEM_INFERENCE", line 302
ORA-06512: at "MDSYS.SDO_SEM_INFERENCE", line 352
ORA-06512: at "MDSYS.RDF_APIS", line 118
ORA-06512: at line 2
29532. 00000 - "Java call terminated by uncaught Java exception: %s"
*Cause:    A Java exception or error was signaled and could not be
           resolved by the Java code.
*Action:   Modify Java code, if this behavior is not intended.
According to the post built-in primitives(noValue,remove) for user defined rules, it seems negation is not supported in user defined rules. Can you please advice how to implement negation in user defined rules? Thanks a lot in advance.
Hong

Hi Hong,
Let's look at this similar but simplified problem:
if (?p rdf:type :Patient) and (NOT_EXISTS(?p :present :c2)) ==> (?p :recommendation :medication1)
You can use something like this in the user defined inferencing:
-- First get the numeric IDs for the relevant URIs
recomID := sdo_sem_inference.oracle_orardf_add_res('http://..../recommendation');
medID := sdo_sem_inference.oracle_orardf_add_res('http://..../medication1')
rdfTypeID := sdo_sem_inference.oracle_orardf_res2vid('... full URI for rdf:type');
patientID := ...
presentID := ...
c2ID := ...
-- Now this query will find out ?p that satisfy (?p rdf:type :Patient) but not
-- (?p :present :c2)
sqlStmt := '
select ids1.sid sub
     from ' || src_tab_view || ' ids1
    where ids1.pid= ' || to_char(rdfTypeID,'TM9') || '
      and not exists (
         select 1
           from ' || src_tab_view || '
          where sid = ids1.sid
            and pid = ' || to_char(presentID, 'TM9') || '
            and oid = '|| to_char(c2ID,'TM9') || '
insertStmt := '
insert /*+ parallel append */
   into ' || output_tab || '(sid, pid, oid)
select sub, '||to_char(recomID,'TM9') || ',' || to_char(medID,'TM9') || '
   from (' || sqlStmt || ')'
More details can be found in
http://docs.oracle.com/cd/E16655_01/appdev.121/e17895/inference_extension.htm#CHDDBGEC
Hope it helps,
Zhe Wu

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Dear all.
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(2) Also, a simple stored proc as defined below missed out:
CREATE PROCEDURE [SalesLT].[SayHi]
AS
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About user defined function in user defined rule

Hi,
I am wondering if I can use a user defined function in a user defined rule in oracle sem.. I've seen examples of user defined function used in sparql query filter clause in that dev. guide. However, I don't know if I can define a function in oracle sem. database and use it in the rule body or head. For example, I want to define a duration function that calculate the date difference between two dates. Then, I want to define a rule like this: event1 :has_start_date d1 and event1: has_end_date d2 and duration (24, d1,d2) then event1:date_satisfiable "yes". Does oracle support this kind of rule? Thank you very much.
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IS
BEGIN
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Hi
Our client wants to extend MSS to all managers, and to begin with want option of "Only B002 Relationship" in drop down of Team Calendar.
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Regards
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you need to set the evaluation path as I have mentioned in my earlier reply....
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20 S A 008 Holder * *
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Edited by: Saurabh Agarwal on Jul 24, 2011 7:44 AM

User-defined rules with SPIN (SPARQL CONSTRUCT)

Hi,
We are looking at SPIN as an alternative to define and execute user-defined rules. It is very expressive and in that point looks superior over Jena, SWRL and Oracle type of user-defined rules with IF (filter) -> THEN type of syntax. Although, SPIN is TopQuadrant's, it is entirely SPARQL, and Oracle supports SPARQL CONSTRUCT via Jena Adapter. TopBraid Composer provides and excellent tool support and rule editor for SPIN rules as well.
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Zhe Wu

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User defined rule for missing triples

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