<?xml version="1.0"?>
<!DOCTYPE rdf:RDF [
<!ENTITY owl "http://www.w3.org/2002/07/owl#" >
<!ENTITY dc "http://purl.org/dc/elements/1.1/" >
<!ENTITY owl11 "http://www.w3.org/2006/12/owl11#" >
<!ENTITY xsd "http://www.w3.org/2001/XMLSchema#" >
<!ENTITY owl11xml "http://www.w3.org/2006/12/owl11-xml#" >
<!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#" >
<!ENTITY daml "http://www.daml.org/2001/03/daml+oil#" >
<!ENTITY rdf "http://www.w3.org/1999/02/22-rdf-syntax-ns#" >
<!ENTITY te "http://www.tele.pw.edu.pl/~sims-onto/TelecomEntity.owl#" >
<!ENTITY ct "http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#" >
<!ENTITY pc "http://www.tele.pw.edu.pl/~sims-onto/ParticipantCharacteristic.owl#" >
]>
<rdf:RDF xmlns="http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#"
xml:base="http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl"
xmlns:owl11="http://www.w3.org/2006/12/owl11#"
xmlns:owl11xml="http://www.w3.org/2006/12/owl11-xml#"
xmlns:te="http://www.tele.pw.edu.pl/~sims-onto/TelecomEntity.owl#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:pc="http://www.tele.pw.edu.pl/~sims-onto/ParticipantCharacteristic.owl#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:ct="http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:daml="http://www.daml.org/2001/03/daml+oil#"
xmlns:owl="http://www.w3.org/2002/07/owl#">
<owl:Ontology rdf:about="">
<rdfs:label rdf:datatype="&xsd;string"
>Connectivity types</rdfs:label>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines types of connectivity used in communication and bearer services accessible in certain connectivity.</rdfs:comment>
<owl:priorVersion rdf:datatype="&xsd;string"
>Version 1.0 (2006-10-24), first phase</owl:priorVersion>
<owl:imports rdf:resource="http://www.tele.pw.edu.pl/~sims-onto/ParticipantCharacteristic.owl"/>
<owl:versionInfo rdf:datatype="&xsd;string">1.4</owl:versionInfo>
</owl:Ontology>
<!--
///////////////////////////////////////////////////////////////////////////////////////
//
// Object Properties
//
///////////////////////////////////////////////////////////////////////////////////////
-->
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#hasBearerType -->
<owl:ObjectProperty rdf:about="#hasBearerType">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines transmission technology.</rdfs:comment>
<rdfs:range rdf:resource="#BearerType"/>
<rdfs:domain rdf:resource="#NetworkBearerService"/>
</owl:ObjectProperty>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#hasNetworkBearerService -->
<owl:ObjectProperty rdf:about="#hasNetworkBearerService">
<rdfs:domain rdf:resource="&te;ConnectivityType"/>
<rdfs:range rdf:resource="#NetworkBearerService"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines network bearers supported by connectivity type.</rdfs:comment>
</owl:ObjectProperty>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#referesToAddress -->
<owl:ObjectProperty rdf:about="#referesToAddress">
<rdfs:domain rdf:resource="#NetworkBearerService"/>
<rdfs:range rdf:resource="#BearerAddressType"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines network address type used by network bearer type.</rdfs:comment>
</owl:ObjectProperty>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#referesToNetwork -->
<owl:ObjectProperty rdf:about="#referesToNetwork">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines network which supports bearer.</rdfs:comment>
<rdfs:domain rdf:resource="#NetworkBearerService"/>
<rdfs:range rdf:resource="#Network"/>
</owl:ObjectProperty>
<!--
///////////////////////////////////////////////////////////////////////////////////////
//
// Classes
//
///////////////////////////////////////////////////////////////////////////////////////
-->
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#BearerAddressType -->
<owl:Class rdf:about="#BearerAddressType">
<rdfs:subClassOf rdf:resource="&owl;Thing"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines type of address supported in network and associated with bearer. Specific addresses are modelled as instances e.g. GSM_MSISDN describe type of address used in GSM network.</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#BearerType -->
<owl:Class rdf:about="#BearerType">
<rdfs:subClassOf rdf:resource="&owl;Thing"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines transmission technology used to transfer voice or data in network.</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#CellularConnectivityType -->
<owl:Class rdf:about="#CellularConnectivityType">
<rdfs:subClassOf rdf:resource="#LongRangeConnectivityType"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Cellular connectivity, e.g., GSM</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#DataBearerService -->
<owl:Class rdf:about="#DataBearerService">
<rdfs:subClassOf rdf:resource="#NetworkBearerService"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer capable to transmit data.</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#LongRangeConnectivityType -->
<owl:Class rdf:about="#LongRangeConnectivityType">
<rdfs:subClassOf rdf:resource="#WirelessConnectivityType"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Long range wireless connectivity, such as WiMAX or GSM</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#Network -->
<owl:Class rdf:about="#Network">
<rdfs:subClassOf rdf:resource="&owl;Thing"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines general term for telecommunication network.</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#NetworkBearerService -->
<owl:Class rdf:about="#NetworkBearerService">
<rdfs:subClassOf rdf:resource="&owl;Thing"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines network bearer service that allows transmission of information signals between network interfaces. E.g. transmission of MMS in GSM network is modelled as instance 'GSM_GPRS_IPV4'. Bearer capabilities are modeled as sublasses.</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#ShortRangeConnectivityType -->
<owl:Class rdf:about="#ShortRangeConnectivityType">
<rdfs:subClassOf rdf:resource="#WirelessConnectivityType"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Short range wireless connectivity type (WiFi, Bluetooth)</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#TextBearerService -->
<owl:Class rdf:about="#TextBearerService">
<rdfs:subClassOf rdf:resource="#NetworkBearerService"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer capable to transmit text. E.g. bearer responsible for SMS transfer.</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#VideoBearerService -->
<owl:Class rdf:about="#VideoBearerService">
<rdfs:subClassOf rdf:resource="#VoiceBearerService"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer capable to transmit video.</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#VoiceBearerService -->
<owl:Class rdf:about="#VoiceBearerService">
<rdfs:subClassOf rdf:resource="#NetworkBearerService"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer capable to transmit voice.</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#WirelessConnectivityType -->
<owl:Class rdf:about="#WirelessConnectivityType">
<rdfs:subClassOf rdf:resource="&te;ConnectivityType"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Wireless connectivity type (e.g., GSM connectivity)</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#WirelineConnectivityType -->
<owl:Class rdf:about="#WirelineConnectivityType">
<rdfs:subClassOf rdf:resource="&te;ConnectivityType"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Fixed, wireline connectivity type (e.g., PSTN)</rdfs:comment>
</owl:Class>
<!-- http://www.tele.pw.edu.pl/~sims-onto/TelecomEntity.owl#ConnectivityType -->
<owl:Class rdf:about="&te;ConnectivityType">
<rdfs:subClassOf>
<owl:Restriction>
<owl:onProperty rdf:resource="#hasNetworkBearerService"/>
<owl:allValuesFrom rdf:resource="#NetworkBearerService"/>
</owl:Restriction>
</rdfs:subClassOf>
<rdfs:subClassOf>
<owl:Restriction>
<owl:onProperty rdf:resource="#hasNetworkBearerService"/>
<owl:someValuesFrom rdf:resource="#NetworkBearerService"/>
</owl:Restriction>
</rdfs:subClassOf>
</owl:Class>
<!-- http://www.w3.org/2002/07/owl#Thing -->
<owl:Class rdf:about="&owl;Thing"/>
<!--
///////////////////////////////////////////////////////////////////////////////////////
//
// Individuals
//
///////////////////////////////////////////////////////////////////////////////////////
-->
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#BluetoothConnectivity -->
<ShortRangeConnectivityType rdf:about="#BluetoothConnectivity">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines Bluetooth connectivity.</rdfs:comment>
</ShortRangeConnectivityType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#CSD -->
<BearerType rdf:about="#CSD">
<rdfs:comment rdf:datatype="&xsd;string"
>Circuit Switched Data (CSD) is the original form of data transmission developed for the time division multiple access (TDMA)-based mobile phone systems like Global System for Mobile Communications (GSM).</rdfs:comment>
</BearerType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#EDGE -->
<BearerType rdf:about="#EDGE">
<rdfs:comment rdf:datatype="&xsd;string"
>Defnes Enhanced Data rates for GSM Evolution technology which allows to increase data transmission rate.</rdfs:comment>
</BearerType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GPRS -->
<BearerType rdf:about="#GPRS">
<rdfs:comment rdf:datatype="&xsd;string"
>General Packet Radio Service (GPRS) is a Mobile Data Service available to users of Global System for Mobile Communications (GSM) and IS-136 mobile phones.</rdfs:comment>
</BearerType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM -->
<Network rdf:about="#GSM">
<rdfs:comment rdf:datatype="&xsd;string"
>The Global System for Mobile communications is the most popular standard for mobile phones in the world. GSM is a cellular network, which means that mobile phones connect to it by searching for cells in the immediate vicinity.</rdfs:comment>
</Network>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSMConnectivity -->
<CellularConnectivityType rdf:about="#GSMConnectivity">
<hasNetworkBearerService rdf:resource="#GSM_GPRS_IPV4"/>
<hasNetworkBearerService rdf:resource="#GSM_CSD_IPv4"/>
<hasNetworkBearerService rdf:resource="#GSM_SMS_MSISDN"/>
<hasNetworkBearerService rdf:resource="#GSM_CSD_MSISDN"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines GSM connectivity.</rdfs:comment>
</CellularConnectivityType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM_CSD_IPv4 -->
<DataBearerService rdf:about="#GSM_CSD_IPv4">
<referesToNetwork rdf:resource="#GSM"/>
<referesToAddress rdf:resource="#IPv4"/>
<hasBearerType rdf:resource="#CSD"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer service in GSM network which use IPv4 address type and CSD bearer. Type of data transfer bearer in GSM network.</rdfs:comment>
</DataBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM_CSD_MSISDN -->
<VoiceBearerService rdf:about="#GSM_CSD_MSISDN">
<hasBearerType rdf:resource="#CSD"/>
<referesToAddress rdf:resource="#GSM_MSISDN"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer service in GSM network which use MSISDN address type and CSD bearer. Type of voice transfer bearer in GSM network.</rdfs:comment>
<referesToNetwork rdf:resource="#GSM"/>
</VoiceBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM_EDGE_IPv4 -->
<DataBearerService rdf:about="#GSM_EDGE_IPv4">
<referesToAddress rdf:resource="#IPv4"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines EDGE bearer service in GSM network with IPv4 address protocol.</rdfs:comment>
<hasBearerType rdf:resource="#EDGE"/>
<referesToNetwork rdf:resource="#GSM"/>
</DataBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM_GPRS_IPV4 -->
<DataBearerService rdf:about="#GSM_GPRS_IPV4">
<referesToAddress rdf:resource="#IPv4"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines GPRS bearer service in GSM network using IPv4 address type. Type of data transfer bearer in GSM network.</rdfs:comment>
<hasBearerType rdf:resource="#GPRS"/>
<referesToNetwork rdf:resource="#GSM"/>
</DataBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM_HSCSD_IPv4 -->
<DataBearerService rdf:about="#GSM_HSCSD_IPv4">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines HSCSD bearer service in GSM network with IP v4 address protocol.</rdfs:comment>
<referesToAddress rdf:resource="#IPv4"/>
<hasBearerType rdf:resource="#HSCSD"/>
<referesToNetwork rdf:resource="#GSM"/>
</DataBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM_MSISDN -->
<BearerAddressType rdf:about="#GSM_MSISDN">
<rdfs:comment rdf:datatype="&xsd;string"
>MSISDN (Mobile Subscriber ISDN Number) refers to the telephone number of a mobile subscriber. MSISDN by ITU-T is at most 15 digits long and consists of: * CC - Country Code ( 1-3 digits e.g."48" for Poland), * NDC - National Destination Code (e.g. 3 digits in Poland), * SN - Subscriber Number (e.g. 6 remaining digits (123456)).</rdfs:comment>
</BearerAddressType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM_SMS_MSISDN -->
<TextBearerService rdf:about="#GSM_SMS_MSISDN">
<referesToNetwork rdf:resource="#GSM"/>
<hasBearerType rdf:resource="#SMS_BearerType"/>
<referesToAddress rdf:resource="#GSM_MSISDN"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines SMS bearer service in GSM network using GSM_MSISDN address type.</rdfs:comment>
</TextBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#GSM_USSD -->
<DataBearerService rdf:about="#GSM_USSD">
<referesToNetwork rdf:resource="#GSM"/>
<rdfs:comment rdf:datatype="&xsd;string"
>USSD is a technology built into the GSM standard for support of transmitting information over the signaling channels of the GSM network. USSD provides session-based communication. Defined within the GSM standard in the documents GSM 02.90 (USSD Stage 1) and GSM 03.90 (USSD Stage 2).</rdfs:comment>
<hasBearerType rdf:resource="#USSD"/>
</DataBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#HSCSD -->
<BearerType rdf:about="#HSCSD">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines High-Speed Circuit-Switched Data, data transmission mechanism in GSM Network, enhancement of CSD.</rdfs:comment>
</BearerType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#IPv4 -->
<BearerAddressType rdf:about="#IPv4">
<rdfs:comment rdf:datatype="&xsd;string"
>IP address (Internet Protocol address) is a unique address that certain electronic devices use in order to identify and communicate with each other on a computer network utilizing the Internet Protocol standard (IP). IPv4 uses 32-bit (4 byte) addresses.</rdfs:comment>
</BearerAddressType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#IPv6 -->
<BearerAddressType rdf:about="#IPv6">
<rdfs:comment rdf:datatype="&xsd;string"
>IP address (Internet Protocol address) is a unique address that certain electronic devices use in order to identify and communicate with each other on a computer network utilizing the Internet Protocol standard (IP). IPv6 uses 128-bit addresses.</rdfs:comment>
</BearerAddressType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#IS-95 -->
<Network rdf:about="#IS-95">
<rdfs:comment rdf:datatype="&xsd;string"
>Interim Standard 95 (IS-95), is the first CDMA-based digital cellular standard pioneered by Qualcomm. CDMA or "code division multiple access" is a digital radio system that transmits streams of bits (PN Sequences).</rdfs:comment>
</Network>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#IrDAConnectivity -->
<ShortRangeConnectivityType rdf:about="#IrDAConnectivity">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines IrDA connectivity.</rdfs:comment>
</ShortRangeConnectivityType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#SMS_BearerType -->
<BearerType rdf:about="#SMS_BearerType">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines transmission technology used in GSM network to transmit SMS messages.</rdfs:comment>
</BearerType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#UMTS -->
<Network rdf:about="#UMTS">
<rdfs:comment rdf:datatype="&xsd;string"
>Universal Mobile Telecommunications System (UMTS) is one of the third-generation (3G) cell phone technologies.</rdfs:comment>
</Network>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#UMTSConnectivity -->
<CellularConnectivityType rdf:about="#UMTSConnectivity">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines UMTS connectivity</rdfs:comment>
<hasNetworkBearerService rdf:resource="#UMTS_Video_IPv6"/>
</CellularConnectivityType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#UMTS_VideoBearer -->
<BearerType rdf:about="#UMTS_VideoBearer">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer capable to tansfer video data in UMTS networks.</rdfs:comment>
</BearerType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#UMTS_Video_IPv6 -->
<VideoBearerService rdf:about="#UMTS_Video_IPv6">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines video bearer in UMTS network which use IPv6 address type. It is bearer capable to transfer video.</rdfs:comment>
</VideoBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#USSD -->
<BearerType rdf:about="#USSD">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer capable to transmit information over the signaling channels of the GSM network.</rdfs:comment>
</BearerType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#WLAN -->
<Network rdf:about="#WLAN">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines wireless LAN network type.</rdfs:comment>
</Network>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#WLANBearer -->
<BearerType rdf:about="#WLANBearer">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer accessible in wireless LAN networks specified in 802.11 IEEE standars.</rdfs:comment>
</BearerType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#WLAN_IPv4 -->
<DataBearerService rdf:about="#WLAN_IPv4">
<referesToAddress rdf:resource="#IPv4"/>
<rdfs:comment rdf:datatype="&xsd;string"
>Defines bearer service in WLAN networks with IPv4 address protocol.</rdfs:comment>
<hasBearerType rdf:resource="#WLANBearer"/>
<referesToNetwork rdf:resource="#WLAN"/>
</DataBearerService>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#WiFiConnectivity -->
<ShortRangeConnectivityType rdf:about="#WiFiConnectivity">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines wi-fi connectivity.</rdfs:comment>
</ShortRangeConnectivityType>
<!-- http://www.tele.pw.edu.pl/~sims-onto/ConnectivityType.owl#WiMAXConnectivity -->
<LongRangeConnectivityType rdf:about="#WiMAXConnectivity">
<rdfs:comment rdf:datatype="&xsd;string"
>Defines WiMax connectivity.</rdfs:comment>
</LongRangeConnectivityType>
</rdf:RDF>