sparql query example

SPARQL query language for RDF Contents * 1. Invalid duction* 2. Making simple queries* 3. RDF term constraints* 4. SPARQL syntax (syntax)O 4.1 IRIS (URIs)O 4.2 syntax for literalsO 4.3 query the syntax of a VariableO 4.4 blank node syntaxO 4.5 triples model syntaxO 4.6-Object ListO 4.7 Object ListO 4.8 compound listO 4

Semantic understanding of Chinese natural language questions in the Knowledge baseObjective: To convert the natural language of Chinese into SPARQL queryBasic methods:Natural language preprocessing: Word segmentation (Ictclas), named entity recognition, syntactic analysis (Standford Parser) get a parse tree1, using the syntactic analysis tree to construct the user's query semantic graph (

follows: Prefix FOAF: Select distinct? url? Alma? comment where { ? s Foaf:name sname. Bif:contains ' sname '. ? s foaf:depiction? URL. ? s Dbpedia-owl:wikipageexternallink Alma. ? s rdfs:comment comment. } Limit 10 The SPARQL statement is the query that contains the name of the term, and then returns the URL of the picture, the URL of the homepage, and the profile. Let's f

This article mainly introduces ThinkPHP query statements and associated query usage, and common query methods in the form of instances, including techniques such as using arrays as query conditions and object methods to query, for more information about ThinkPHP, see ThinkPH

defines information such as pagination Indexsearcher.search (query query, int n,sort sort, Boolean dodocscores, Boolean Domaxscore) implements arbitrary-ordered queries while controlling whether hit is calculated Whether score and Max score are counted, query the first n of the document that meets the query criter

getall method not only extracts all the data, in addition, we may also take out unnecessary field values. The getone method may not actually be of the int type for the table's primary key, so these definitions will be problematic... Therefore, we have seen many projects that use Orm. Whether all data is required or not, let's take it out first. Whether the primary key is of the int type or not, set a method there. It's a big deal to be an empty method, whether or not the current object requires

PHP outputs the database query result as a simple instance in json format, and the query result is json. PHP outputs the database query result as a simple example in json format. the query result is json1_deconn. php is a database link file and does not search for phpinclude

1.DNS Query process: Take query www.baidu.com as an example (1) The computer sends the request of parsing www.baidu.com to the local domain name server(2) The local domain name server receives the request, first inquires the local cache, if finds the direct return query result, if does not have this record, the local

of the data table. Then we can read the loaded values like the properties of a normal object, such as Echo $post->title;. If you do not find anything in the database using the given query criteria, the Find method returns NULL. When we call find, we use $condition and $params to specify the query criteria. Here $condition can be a where string in an SQL statement, $params a parameter array where the value

can then read the loaded values like the properties of normal objects, such as Echo $post->title;. If nothing is found in the database using the given query criteria, the Find method returns NULL. When we call find, we use $condition and $params to specify the query criteria. Here $condition can be a where string in an SQL statement, $params An array of arguments, where the value should be bound to a plac

For example, the user_num table: Example 1:Query the user that appears twice Beginners often mistakenly think that the count () algorithm is directly used in the where statement. Obviously, this idea is wrong. The count () method cannot be used in the where clause, to solve the problem, we can use HAVING next to the group by clause as the condition restriction.

Turn on caching, set cache size, and implement the following: 1, modify the configuration file, Windows under the My.ini,linux is my.cnf; On the last append to the configuration file: The code is as follows Copy Code Query_cache_type = 1Query_cache_size = 600000 Need to restart MySQL in effect; Then adopt the second way; b to open the cache, two ways: A) Use the MySQL command: The code is as follows Copy Code Set global que

Example of ticket query by applet, and example of Applet Simple Example of a applet-train ticket query application, learning to master the applet framework and implementation of development steps. Small programs are lightweight and easy-to-use. They are easy to learn and use

if (Isset ($xx)) { $dodo = @file ("http://www.e9china.com/cgi-bin/comdns.pl?raw=1lookup=OKfqdn=". $fqdn. " domain= ". $domain." root= ". $root." cdomain=2.7 "); $i = 0; while ($dodo [$i]) { echo $dodo [$i]; $i + +; } Exit } ?> if (Isset ($submit)) { if ($domain = = "") {echo "Please enter the domain name"; exit;} $dom = @file ("http://www.e9china.com/cgi-bin/comdns.pl?cdomain=2.7lookup=OKdomain=". $domain. " root= ". $root); $dom 1=substr ("$dom [13]", 19); $dom 1=chop ($dom 1); Switch ($dom 1)

longitude and latitude two columns in the data table to optimize the speed at which the where statement executes.The final SQL statement is as follows 1 $sql=‘select * from users_location where 2 latitude >‘.$lat.‘-1and 3 latitude ‘.$lat.‘+1and 4 longitude >‘.$lon.‘-1and 5 longitude ‘.$lon.‘+1 6 order by ACOS(SIN((‘

This article describes how to use Sparqlwrapper.js to read DBpedia data and display it. Objective of this article: Enter an English word and return the relevant information in the wiki. The main problem to be solved in this paper is what kind of SPARQL statement can find out what we need. First look at a simple SPARQL query statement PREFIX: First, define

Destoon multi-Table query example and Destoon implementation example In this example, Destoon multi-table queries can be implemented. It is of great practical value in the secondary development of destoon. The specific implementation method is as follows: 1. template file section The Code is as follows: 2. php code Th

Original example URL: http://resources.esri.com/help/9.3/arcgisserver/apis/flex/samples/index.html I changed the code as follows: When browsing, you can find that the query window is on the next layer of the map. The map is displayed, but you cannot query it ...... Modifying ......

Php example of vehicle violation query data, php example of vehicle Violation It is convenient for car owners to know whether they have experienced traffic violations at any time, so as to avoid unnecessary losses caused by forgetting or handling tickets within the time limit. This code example is a call to the nationa

Example of the mobile phone number attribution-related information query function implemented by Python, python example This example describes how to query information related to mobile phone number attribution in Python. We will share this with you for your reference. The d