blocks|key|2657045|text|首先，请注意，在DBpedia上，Nero+(当前)来自result+rows+109+and+110，因此您至少需要110行才能看到他。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2657046|现在，请注意，尼罗对on+DBpedia-Live的描述与on+DBpedia不同--两者都不正确。|2657047|特别要注意的是，在DBpedia-Live上，http://dbpedia.org/ontology/birthDate的http://dbpedia.org/property/birthDate有一个值--+1937-12-15+(xsd:date)+--而在DBpedia上，Nero有两个值--+0037-12-15+(xsd:date)和1937-12-15+(xsd:date)。|style|CODE|BOLD|2657048|还要注意，在DBpedia-Live上，http://dbpedia.org/property/birthDate没有http://dbpedia.org/ontology/birthDate值--而在DBpedia上，Nero没有值。|2657049|您应该会对这些结果感兴趣--在DBpedia上，在DBpedia-Live上。|2657050|entityMap|0|LINK|mutability|MUTABLE|url|http://dbpedia.org/sparql?default-graph-uri=http%253A%252F%252Fdbpedia.org&qtxt=PREFIX%2520rdf%253A%2520%253Chttp%253A%252F%252Fwww.w3.org%252F1999%252F02%252F22-rdf-syntax-ns%2523%253E%250D%250APREFIX%2520rdfs%253A%2520%253Chttp%253A%252F%252Fwww.w3.org%252F2000%252F01%252Frdf-schema%2523%253E%250D%250APREFIX%2520dbo%253A%2520%253Chttp%253A%252F%252Fdbpedia.org%252Fontology%252F%253E%250D%250ASELECT%2520DISTINCT%2520%253Fx0%2520%253Fname2%2520%253Fdob%2520%250D%250AWHERE%2520%257B%250D%250A%2520%2520%253Fx0%2520rdf%253Atype%2520foaf%253APerson.%250D%250A%2520%2520%253Fx0%2520rdfs%253Alabel%2520%253Fname.%250D%250A%2520%2520%253Fx0%2520dbo%253AbirthDate%2520%253Fdob.%250D%250A%2520%2520FILTER%2520REGEX%2528%253Fname%252C%2522%255ENer.*%2522%252C%2522i%2522%2529.%250D%250A%2520%2520BIND%2520%2528str%2528%253Fname%2529%2520AS%2520%253Fname2%2529%250D%250A%257D%2520ORDER%2520BY%2520%253Fname2%2520LIMIT%2520110%250D%250A%250D%250A&format=text%252Fhtml&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=30000&debug=on&run=%2520Run%2520Query%2520|1|http://live.dbpedia.org/page/Nero|2|http://dbpedia.org/page/Nero|3|http://dbpedia.org/sparql?default-graph-uri=http%253A%252F%252Fdbpedia.org&qtxt=PREFIX%2520rdf%253A%2520%253Chttp%253A%252F%252Fwww.w3.org%252F1999%252F02%252F22-rdf-syntax-ns%2523%253E%250D%250APREFIX%2520rdfs%253A%2520%253Chttp%253A%252F%252Fwww.w3.org%252F2000%252F01%252Frdf-schema%2523%253E%250D%250APREFIX%2520dbo%253A%2520%253Chttp%253A%252F%252Fdbpedia.org%252Fontology%252F%253E%250D%250APREFIX%2520dbp%253A%2520%253Chttp%253A%252F%252Fdbpedia.org%252Fproperty%252F%253E%250D%250ASELECT%2520DISTINCT%2520*%250D%250AWHERE%2520%257B%250D%250A%2520%2520%253Fx0%2520rdf%253Atype%2520foaf%253APerson.%250D%250A%2520%2520%253Fx0%2520rdfs%253Alabel%2520%253Fname.%250D%250A%2520%2520OPTIONAL%2520%257B%2520%253Fx0%2520dbo%253AbirthDate%2520%253FdobONTOLOGY.%2520%257D%250D%250A%2520%2520OPTIONAL%2520%257B%2520%253Fx0%2520dbp%253AbirthDate%2520%253FdobPROPERTY.%2520%257D%250D%250A%2520%2520FILTER%2520REGEX%2528%253Fname%252C%2522%255ENero.*%2522%252C%2522i%2522%2529.%250D%250A%2520%2520BIND%2520%2528str%2528%253Fname%2529%2520AS%2520%253Fname2%2529%250D%250A%257D%2520ORDER%2520BY%2520%253Fname2%2520LIMIT%2520110%250D%250A%250D%250A&format=text%252Fhtml&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=30000&debug=on&run=%2520Run%2520Query%2520|4|http://live.dbpedia.org/sparql?default-graph-uri=http%253A%252F%252Fdbpedia.org&qtxt=PREFIX%2520rdf%253A%2520%253Chttp%253A%252F%252Fwww.w3.org%252F1999%252F02%252F22-rdf-syntax-ns%2523%253E%250D%250APREFIX%2520rdfs%253A%2520%253Chttp%253A%252F%252Fwww.w3.org%252F2000%252F01%252Frdf-schema%2523%253E%250D%250APREFIX%2520dbo%253A%2520%253Chttp%253A%252F%252Fdbpedia.org%252Fontology%252F%253E%250D%250APREFIX%2520dbp%253A%2520%253Chttp%253A%252F%252Fdbpedia.org%252Fproperty%252F%253E%250D%250ASELECT%2520DISTINCT%2520*%250D%250AWHERE%2520%257B%250D%250A%2520%2520%253Fx0%2520rdf%253Atype%2520foaf%253APerson.%250D%250A%2520%2520%253Fx0%2520rdfs%253Alabel%2520%253Fname.%250D%250A%2520%2520OPTIONAL%2520%257B%2520%253Fx0%2520dbo%253AbirthDate%2520%253FdobONTOLOGY.%2520%257D%250D%250A%2520%2520OPTIONAL%2520%257B%2520%253Fx0%2520dbp%253AbirthDate%2520%253FdobPROPERTY.%2520%257D%250D%250A%2520%2520FILTER%2520REGEX%2528%253Fname%252C%2522%255ENero.*%2522%252C%2522i%2522%2529.%250D%250A%2520%2520BIND%2520%2528str%2528%253Fname%2529%2520AS%2520%253Fname2%2529%250D%250A%257D%2520ORDER%2520BY%2520%253Fname2%2520LIMIT%2520110%250D%250A%250D%250A&format=text%252Fhtml&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=30000&debug=on&run=%2520Run%2520Query%2520^0|S|N|0|0|A|F|1|T|A|2|0|N|11|1P|11|2X|L|47|L|4T|L|16|8|28|8|0|K|11|1N|11|13|8|26|8|0|F|7|3|P|C|4|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@$A|15|B|16|1|17]]|C|$]]|$1|D|3|E|5|6|7|18|8|@]|9|@$A|19|B|1A|1|1B]|$A|1C|B|1D|1|1E]]|C|$]]|$1|F|3|G|5|6|7|1F|8|@$A|1G|B|1H|H|I]|$A|1I|B|1J|H|I]|$A|1K|B|1L|H|I]|$A|1M|B|1N|H|I]|$A|1O|B|1P|H|I]|$A|1Q|B|1R|H|J]|$A|1S|B|1T|H|J]]|9|@]|C|$]]|$1|K|3|L|5|6|7|1U|8|@$A|1V|B|1W|H|I]|$A|1X|B|1Y|H|I]|$A|1Z|B|20|H|J]|$A|21|B|22|H|J]]|9|@]|C|$]]|$1|M|3|N|5|6|7|23|8|@]|9|@$A|24|B|25|1|26]|$A|27|B|28|1|29]]|C|$]]|$1|O|3|-4|5|6|7|2A|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]|Y|$5|R|S|T|C|$U|Z]]|10|$5|R|S|T|C|$U|11]]|12|$5|R|S|T|C|$U|13]]]]

First thing, note that on DBpedia, Nero (currently) comes in <a href="http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&amp;qtxt=PREFIX%20rdf%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E%0D%0APREFIX%20rdfs%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23%3E%0D%0APREFIX%20dbo%3A%20%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2F%3E%0D%0ASELECT%20DISTINCT%20%3Fx0%20%3Fname2%20%3Fdob%20%0D%0AWHERE%20%7B%0D%0A%20%20%3Fx0%20rdf%3Atype%20foaf%3APerson.%0D%0A%20%20%3Fx0%20rdfs%3Alabel%20%3Fname.%0D%0A%20%20%3Fx0%20dbo%3AbirthDate%20%3Fdob.%0D%0A%20%20FILTER%20REGEX%28%3Fname%2C%22%5ENer.*%22%2C%22i%22%29.%0D%0A%20%20BIND%20%28str%28%3Fname%29%20AS%20%3Fname2%29%0D%0A%7D%20ORDER%20BY%20%3Fname2%20LIMIT%20110%0D%0A%0D%0A&amp;format=text%2Fhtml&amp;CXML_redir_for_subjs=121&amp;CXML_redir_for_hrefs=&amp;timeout=30000&amp;debug=on&amp;run=%20Run%20Query%20" rel="nofollow noreferrer">result rows 109 and 110</a>, so you need at least 110 rows to see him.

Now, note that Nero's description <a href="http://live.dbpedia.org/page/Nero" rel="nofollow noreferrer">on DBpedia-Live</a> is different than <a href="http://dbpedia.org/page/Nero" rel="nofollow noreferrer">on DBpedia</a> -- and that neither is correct.

Of particular note, see that on DBpedia-Live, Nero's <code>http://dbpedia.org/</code><code>property</code><code>/birthDate</code> has one value -- <code>1937-12-15 (xsd:date)</code> -- while on DBpedia, <code>http://dbpedia.org/</code><code>ontology</code><code>/birthDate</code> has two values -- <code>0037-12-15 (xsd:date)</code> and <code>1937-12-15 (xsd:date)</code>.

Also note that on DBpedia-Live, Nero has no <code>http://dbpedia.org/</code><code>ontology</code><code>/birthDate</code> value -- while on DBpedia, <code>http://dbpedia.org/</code><code>property</code><code>/birthDate</code> has no value.

These results should be of interest to you -- on <a href="http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&amp;qtxt=PREFIX%20rdf%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E%0D%0APREFIX%20rdfs%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23%3E%0D%0APREFIX%20dbo%3A%20%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2F%3E%0D%0APREFIX%20dbp%3A%20%3Chttp%3A%2F%2Fdbpedia.org%2Fproperty%2F%3E%0D%0ASELECT%20DISTINCT%20*%0D%0AWHERE%20%7B%0D%0A%20%20%3Fx0%20rdf%3Atype%20foaf%3APerson.%0D%0A%20%20%3Fx0%20rdfs%3Alabel%20%3Fname.%0D%0A%20%20OPTIONAL%20%7B%20%3Fx0%20dbo%3AbirthDate%20%3FdobONTOLOGY.%20%7D%0D%0A%20%20OPTIONAL%20%7B%20%3Fx0%20dbp%3AbirthDate%20%3FdobPROPERTY.%20%7D%0D%0A%20%20FILTER%20REGEX%28%3Fname%2C%22%5ENero.*%22%2C%22i%22%29.%0D%0A%20%20BIND%20%28str%28%3Fname%29%20AS%20%3Fname2%29%0D%0A%7D%20ORDER%20BY%20%3Fname2%20LIMIT%20110%0D%0A%0D%0A&amp;format=text%2Fhtml&amp;CXML_redir_for_subjs=121&amp;CXML_redir_for_hrefs=&amp;timeout=30000&amp;debug=on&amp;run=%20Run%20Query%20" rel="nofollow noreferrer">DBpedia</a>, and on <a href="http://live.dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&amp;qtxt=PREFIX%20rdf%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E%0D%0APREFIX%20rdfs%3A%20%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23%3E%0D%0APREFIX%20dbo%3A%20%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2F%3E%0D%0APREFIX%20dbp%3A%20%3Chttp%3A%2F%2Fdbpedia.org%2Fproperty%2F%3E%0D%0ASELECT%20DISTINCT%20*%0D%0AWHERE%20%7B%0D%0A%20%20%3Fx0%20rdf%3Atype%20foaf%3APerson.%0D%0A%20%20%3Fx0%20rdfs%3Alabel%20%3Fname.%0D%0A%20%20OPTIONAL%20%7B%20%3Fx0%20dbo%3AbirthDate%20%3FdobONTOLOGY.%20%7D%0D%0A%20%20OPTIONAL%20%7B%20%3Fx0%20dbp%3AbirthDate%20%3FdobPROPERTY.%20%7D%0D%0A%20%20FILTER%20REGEX%28%3Fname%2C%22%5ENero.*%22%2C%22i%22%29.%0D%0A%20%20BIND%20%28str%28%3Fname%29%20AS%20%3Fname2%29%0D%0A%7D%20ORDER%20BY%20%3Fname2%20LIMIT%20110%0D%0A%0D%0A&amp;format=text%2Fhtml&amp;CXML_redir_for_subjs=121&amp;CXML_redir_for_hrefs=&amp;timeout=30000&amp;debug=on&amp;run=%20Run%20Query%20" rel="nofollow noreferrer">DBpedia-Live</a>.

I am writing a query in DBpedia live <a href="http://dbpedia-live.openlinksw.com/sparql/" rel="nofollow noreferrer">http://dbpedia-live.openlinksw.com/sparql/</a> to return details of well known people. As a test case, I know there exists a page for the Roman Emperor Nero at <a href="http://dbpedia.org/page/Nero" rel="nofollow noreferrer">http://dbpedia.org/page/Nero</a> but my query does not return a row for him. My SPARQL query is:

<pre><code># Runs in live (http://dbpedia-live.openlinksw.com/sparql/)
PREFIX rdf: &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt;
PREFIX rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt;
PREFIX dbo: &lt;http://dbpedia.org/ontology/&gt;
SELECT DISTINCT ?x0 ?name2 ?dob 
WHERE {
 ?x0 rdf:type foaf:Person.
 ?x0 rdfs:label ?name.
 ?x0 dbo:birthDate ?dob.
 FILTER REGEX(?name,"^Ner.*","i").
 BIND (str(?name) AS ?name2)
} ORDER BY ?name2 LIMIT 100
</code></pre>

I checked the page <a href="http://dbpedia.org/page/Nero" rel="nofollow noreferrer">http://dbpedia.org/page/Nero</a> and it has the rdf:type, rdfs.label and dbo.birthDate properties referenced in my query. When I run the above query it returns 100 other people with name beginning "Ner" using the case insensitive version of REGEX. 

So my question is: Why does the above query not return Nero in the list of results?

SPARQL query cannot find page that should exist

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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