rdfs

First of all, introduce the basic knowledge of Semantic Web books, "Semantic Web Technology system" Guyuzhong, Hu Wei, Cheng. 2015RDFS (Resource Description Framework Schema) is a glossary based on RDF that provides a "http://www.w3.org/2000/01/rdf-schema#" namespace As a standard for users to describe classes and attributes in a particular domain. Unlike XML Schema and XML, Rdfs is a special set of RDF words that define the terms used in RDF data and

, there are two types of text. In a string, the component is a simple string. On the other hand, the string component is expected to be a well-formatted XML segment. When an RDF model is written in the form of RDF/XML, a special attribute Construction Using parsetype = 'literal' will be used to represent it. In Jena, these attributes are set when a text is created. For example, in tutorial11:// Java code // Create the resource Resource r = model. createresource (); // Add the propertyR. addprop

Stderr_fileno)Effect: This function gives the kernel the process of handling the event, unlike the previous blocking pattern, where each socket descriptor has to wait to reduce the process efficiency, or, unlike non-blocking, for each socket descriptor to continually poll for a scan to see if an event occurs, and the CPU utilization is reduced. This function will be more than one effect, multi-socket event effect, concentrated in a socket collection , as long as there is a process can glow.Inst

the document content, and did not solve the semantic and Contact Problems of the document content. RDF and RDF Schema RDFSMain class, features, constraints are as follows: Core category:RDFS: resource,RDF: property, RDFS: Class Core features:RDF: type,RDFS: subclassof, RDFS: subpropertyof Core Constraints:RDFS: constraintresource,

Kosaraju algorithmSee the Challenge Program Design Competition (P320)Template:Const intn=1e5+5;intN,m;vectorint>G[n];vectorint>Rg[n];vectorint>vs;BOOLVis[n];intCmp[n];voidAdd_edge (intUintv) {G[U].PB (v); RG[V].PB (u);} voidDfsintu) {Vis[u]=true; for(intI=0; I) if(!Vis[g[u][i]]) DFS (g[u][i]); VS.PB (u);}voidRdfsintUintk) {Vis[u]=true; Cmp[u]=K; for(intI=0; I) if(!Vis[rg[u][i]]) Rdfs (rg[u][i],k);}intSCC () {mem (Vis,false); Vs.clear ();

Web Ontology Language (OWL) is a network ontology language developed by W3C and used to describe the semantics of the ontology. Since owl is developed based on DAML + 0il for various needs, it is necessary to maintain compatibility with DAML + 0il/RDFS on the one hand, on the other hand, it is necessary to ensure a more powerful semantic expression capability and the deterministic reasoning of the description logic (DL, description logic). Therefore,

specific writing method to describe this abstract data model (no XML is required, or other forms can be used to express RDF ). It is also because of the Super complexity of the real world.Pre-defined words are not enough. We use the RDF Schema to customize words.The characteristics of resources described by RDF are: attributes-centered thinking methods. Instead of defining the attribute value, you can define the scope of the subject (Resource) that owns the attribute (defined domain) and the va

through theirSparqlThe endpoint accesses the content of DBpedia. Here you can try an online example: Online demonstration Alternatively, you can try this example in the following ways: Python examples/dbpedia/main. py "Who is Tom Cruise? "It will output something like this: Select distinct? X1 WHERE {? X0 rdf: type foaf: Person. ? X0 rdfs: label "Tom Cruise" @ en. ? X0 rdfs: comment? X1 .}# OutputThomas Cr

); in } - voidRDfs (intu) to { +vis[u]=true; - for(intI=0; i i) the { * intto=Redge[u][i]; $ if(!Vis[to])Panax Notoginseng RDfs (to); - } the } + voidScc () A { thememset (Vis,false,sizeofvis); + vs.clear (); - for(intI=1; I i) $ if(!Vis[i]) $ Dfs (i); - -memset (Vis,false,sizeofvis); theSameid=0; - for(intI=vs.size ()-1; I >=0;--i)Wuyi { the intv=Vs[i]; - if(!Vis[v]) Wu { -sa

method for creating a vector graph is wonderful. Vector Int > Adj; // Source image // Separate the two '>' with a space in the middle. Vector Int > Radj; // Reverse Graph Vector Int > Dag; // Reverse Dag after point reduction Int N, m, CNT; Int Id [maxn], order [maxn], IND [maxn]; // Strongly connected components, access sequence, inbound Void DFS ( Int U) {visit [u] = True ; Int I, Len = Adj [u]. Size (); For (I = 0 ; I ) If (! Visit [adj [u] [I]) DFS (adj [u] [I]); Order [C

:: Synchronization Control, RDFAndRDFSIndependent export of information, OneRqlQuery Engine, A PairRDF SchemaSemantics provides internal supportRDFQuery Language. We introducedSesame --A general architecture,Its implementation and our experience. 2. ArticleStructure Section 2IntroductionRDFAndRDFS Section 3Design goalsRDFAndRDFSThe necessity of the query language Section 4IntroductionSesameModular architecture Section 5SummarySail APIAnd otherRDF APIComparison of Met

, and data type attributes are used to connect individual and text. For example, Ryan has the hasName data type attribute.An object property like Konw connects Ryan and Andrew. D. Annotation Annotation is actually an attribute. It is similar to other attributes, but it has no associated semantics. It is mainly used for display on the interface. E. Data Type The data type in OWL indicates the value range of the data value. Integer, string, and time are common data types. Thing And nothing

];intv;intCmp[n];voidAdd_edge (intAintb) {G[a].push_back (b); Rg[b].push_back (a);}voidDfsintN) {Used[n]=true; for(intI=0; Ii) {intv =G[n][i]; if(Used[v] = =false) Dfs (v); } vs.push_back (n);}voidRdfsintNintk) {Used[n]=true, cmp[n] =K; for(intI=0; Ii) {intv=Rg[n][i]; if(Used[v] = =false) Rdfs (V, k); }}intSCC () {memset (used,false,sizeof(used)); Vs.clear (); for(intI=0; ii)if(Used[i] = =false) Dfs (i); memset (Used,false,sizeof(used)); intk

group. If yes, it is impossible. If no, it is possible. C ++ 204 Ms 2248 K */ # Include # Include # Include String . H> # Include # Include # Include # Include Using Namespace STD; Const Int Maxn = 1010 ; Bool Visit [maxn]; queue Int > Q1, Q2; // The method for creating a vector graph is wonderful. Vector Int > Adj; // Source image // Separate the two '>' with a space in the middle. Vector Int > Radj; // Reverse Graph Vector Int > Dag; // Reverse Dag after point redu

, and resources. RDF: nil. 9. Specific RDF RDF provides a built-in vocabulary used to describe an RDF statement. The description of a statement using these words is called the reification of the statement ). The specific word collection of RDF contains the following types: RDF: Statement, attributes: RDF: subject, RDF: predicate, and RDF: object. However, exercise caution when using RDF to define words, because it is easy to think that these words define things that are not actually defined. T

#include #include#includeusing namespacestd;Const intmax_n=10005; Vectorint>g[max_n]; vectorint> Rg[max_n];//diagram after the storage edge reversedvectorint> postorder;//Post -sequential traversal of storage graphsintv,e;BOOLUsed[max_n];intComp[max_n];//stores the connected components that each node belongs tovoidAddedge (intUintv) {G[u].push_back (v); Rg[v].push_back (u);}voidDfsintu) {Used[u]=true; for(intI=0; I) { intv=G[u][i]; if(!Used[v]) Dfs (v); } postorder.push_back (U);}v

"The main topic"There are n materials, m judges. Each material can be used to make Manchu or Han Chinese cuisine, and M judges have two kinds of guesses that will satisfy him. Q. Can I meet all the judges ' requirements?IdeasCan only do three questions a day, I have been a wreck ... (Ge ping lying. jpg)Bare 2-sat, first wrote a two times DFS, speed slightly slow ... 24ms?1#include 2#include 3#include 4#include 5#include 6 using namespacestd;7 Const intmaxn= $+ -;8vectorint>E[MAXN];9vectorint>RE[

#include #include#include#include#includestring>#includestring.h>using namespacestd;Const intMaxx =100010;intN,m;vectorint>G[maxx];vectorint>Rg[maxx];vectorint>vs;BOOLVis[maxx];intCmp[maxx];voidDfsintv) {Vis[v]=true; for(intI=0; I) { if(!Vis[g[v][i]]) DFS (g[v][i]); } vs.push_back (v);}voidRdfsintv) {Vis[v]=true; for(intI=0; I) { if(!Vis[rg[v][i]] Rdfs (rg[v][i]); }}intMain () { while(SCANF ("%d%d", n,m) (n+m)! =0) {

]; - intComponentnumber=0; the intindex; -vectorint>Edge[max_v]; -vectorint>Redge[max_v]; -vectorint>Component[max_v]; + intIncomponent[max_v]; - intN, M; + BOOLVisited[max_v]; A at voidAdd_edge (intXinty) - { - edge[x].push_back (y); - redge[y].push_back (x); - } - in voidTarjan (inti) - { todfn[i]=low[i]=index++; +instack[i]=true; - S.push (i); the intJ; * for(intE=0; E) $ {Panax Notoginsengj=Edge[i][e]; - if(dfn[j]==-1) the { + Tarjan (j); Alow[i]=min (low[i], l

summary, I understand that ontology is the formal expression of domain knowledge, so-called domain knowledge, such as e-commerce, commodities, prices, customers these are domain knowledge and concepts. Includes 5 basic primitive classes (classes), relationships (relations), functions (functions), axioms (axioms), and instances (instances). Among them, classes can also be called concepts.Three, the expression of the ontologyThe so-called ontology of the expression is to describe the language of