Added more providers/of modules and javadocs.
Split onos-core feature into onos-api and onos-core.
diff --git a/features/features.xml b/features/features.xml
index b5470b1..2bd3010 100644
--- a/features/features.xml
+++ b/features/features.xml
@@ -19,14 +19,19 @@
         <bundle>mvn:com.sun.jersey/jersey-servlet/1.18.1</bundle>
     </feature>
 
-    <feature name="onos-core" version="1.0.0"
-             description="ONOS core components">
+    <feature name="onos-api" version="1.0.0"
+             description="ONOS services and model API">
         <feature>scr</feature>
         <feature>onos-thirdparty-base</feature>
         <bundle>mvn:org.onlab.onos/onos-utils-osgi/1.0.0-SNAPSHOT</bundle>
         <bundle>mvn:org.onlab.onos/onos-utils-rest/1.0.0-SNAPSHOT</bundle>
 
         <bundle>mvn:org.onlab.onos/onos-api/1.0.0-SNAPSHOT</bundle>
+    </feature>
+
+    <feature name="onos-core" version="1.0.0"
+             description="ONOS core components">
+        <feature>onos-api</feature>
         <bundle>mvn:org.onlab.onos/onos-core/1.0.0-SNAPSHOT</bundle>
     </feature>
 
@@ -60,6 +65,8 @@
         <bundle>mvn:org.onlab.onos/onos-of-ctl/1.0.0-SNAPSHOT</bundle>
 
         <bundle>mvn:org.onlab.onos/onos-of-provider-device/1.0.0-SNAPSHOT</bundle>
+        <bundle>mvn:org.onlab.onos/onos-of-provider-link/1.0.0-SNAPSHOT</bundle>
+        <bundle>mvn:org.onlab.onos/onos-of-provider-host/1.0.0-SNAPSHOT</bundle>
     </feature>
 
 </features>
diff --git a/net/api/src/main/java/org/onlab/onos/net/device/DeviceProvider.java b/net/api/src/main/java/org/onlab/onos/net/device/DeviceProvider.java
index a571a58..9934b8d 100644
--- a/net/api/src/main/java/org/onlab/onos/net/device/DeviceProvider.java
+++ b/net/api/src/main/java/org/onlab/onos/net/device/DeviceProvider.java
@@ -15,8 +15,8 @@
      * Triggers an asynchronous probe of the specified device, intended to
      * determine whether the host is present or not. An indirect result of this
      * should be invocation of
-     * {@link org.onlab.onos.net.device.DeviceProviderService#deviceConnected(DeviceDescription)} )} or
-     * {@link org.onlab.onos.net.device.DeviceProviderService#deviceDisconnected(DeviceDescription)}
+     * {@link org.onlab.onos.net.device.DeviceProviderService#deviceConnected} )} or
+     * {@link org.onlab.onos.net.device.DeviceProviderService#deviceDisconnected}
      * at some later point in time.
      *
      * @param device device to be probed
diff --git a/pom.xml b/pom.xml
index 2cf2936..731d6fc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -261,7 +261,7 @@
                             <title>OpenFlow Providers &amp; Controller
                             </title>
                             <packages>
-                                org.onlab.onos.net.provider.of:org.onlab.onos.net.provider.of.*:org.onlab.onos.of.*
+                                org.onlab.onos.provider.of.*:org.onlab.onos.of.*
                             </packages>
                         </group>
                         <group>
diff --git a/providers/of/device/src/main/java/org/onlab/onos/provider/of/device/impl/OpenFlowDeviceProvider.java b/providers/of/device/src/main/java/org/onlab/onos/provider/of/device/impl/OpenFlowDeviceProvider.java
index af214d3..1fafca5 100644
--- a/providers/of/device/src/main/java/org/onlab/onos/provider/of/device/impl/OpenFlowDeviceProvider.java
+++ b/providers/of/device/src/main/java/org/onlab/onos/provider/of/device/impl/OpenFlowDeviceProvider.java
@@ -16,7 +16,8 @@
 import org.slf4j.LoggerFactory;
 
 /**
- * Device provider which uses an OpenFlow controller to detect devices.
+ * Device provider which uses an OpenFlow controller to detect network
+ * infrastructure devices.
  */
 @Component
 public class OpenFlowDeviceProvider extends AbstractProvider implements DeviceProvider {
@@ -54,7 +55,7 @@
 
     @Override
     public void triggerProbe(Device device) {
-        log.info("Triggerring probe on device {}", device.id());
+        log.info("Triggering probe on device {}", device.id());
     }
 
     @Override
diff --git a/providers/of/device/src/main/javadoc/org/onlab/onos/provider/of/device/impl/package.html b/providers/of/device/src/main/javadoc/org/onlab/onos/provider/of/device/impl/package.html
new file mode 100644
index 0000000..cae24c0
--- /dev/null
+++ b/providers/of/device/src/main/javadoc/org/onlab/onos/provider/of/device/impl/package.html
@@ -0,0 +1,3 @@
+<body>
+Provider that uses OpenFlow controller as a means of infrastructure device discovery.
+</body>
\ No newline at end of file
diff --git a/providers/of/host/pom.xml b/providers/of/host/pom.xml
new file mode 100644
index 0000000..518add8
--- /dev/null
+++ b/providers/of/host/pom.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onlab.onos</groupId>
+        <artifactId>onos-of-providers</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>onos-of-provider-host</artifactId>
+    <packaging>bundle</packaging>
+
+    <description>ONOS OpenFlow protocol host provider</description>
+
+</project>
diff --git a/providers/of/host/src/main/java/org/onlab/onos/provider/of/host/impl/OpenFlowHostProvider.java b/providers/of/host/src/main/java/org/onlab/onos/provider/of/host/impl/OpenFlowHostProvider.java
new file mode 100644
index 0000000..8c30c8b
--- /dev/null
+++ b/providers/of/host/src/main/java/org/onlab/onos/provider/of/host/impl/OpenFlowHostProvider.java
@@ -0,0 +1,58 @@
+package org.onlab.onos.provider.of.host.impl;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.onos.net.Host;
+import org.onlab.onos.net.host.HostProvider;
+import org.onlab.onos.net.host.HostProviderBroker;
+import org.onlab.onos.net.host.HostProviderService;
+import org.onlab.onos.net.provider.AbstractProvider;
+import org.onlab.onos.net.provider.ProviderId;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Device provider which uses an OpenFlow controller to detect network
+ * end-station hosts.
+ */
+@Component
+public class OpenFlowHostProvider extends AbstractProvider implements HostProvider {
+
+    private final Logger log = LoggerFactory.getLogger(OpenFlowHostProvider.class);
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected HostProviderBroker providerBroker;
+
+    private HostProviderService providerService;
+
+//    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+//    protected OpenFlowController controller;
+
+    /**
+     * Creates an OpenFlow host provider.
+     */
+    public OpenFlowHostProvider() {
+        super(new ProviderId("org.onlab.onos.provider.of.host"));
+    }
+
+    @Activate
+    public void activate() {
+        providerService = providerBroker.register(this);
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        providerBroker.unregister(this);
+        providerService = null;
+        log.info("Stopped");
+    }
+
+    @Override
+    public void triggerProbe(Host host) {
+        log.info("Triggering probe on device {}", host);
+    }
+}
diff --git a/providers/of/host/src/main/javadoc/org/onlab/onos/provider/of/host/impl/package.html b/providers/of/host/src/main/javadoc/org/onlab/onos/provider/of/host/impl/package.html
new file mode 100644
index 0000000..fda13cc
--- /dev/null
+++ b/providers/of/host/src/main/javadoc/org/onlab/onos/provider/of/host/impl/package.html
@@ -0,0 +1,3 @@
+<body>
+Provider that uses OpenFlow controller as a means of host discovery and tracking.
+</body>
\ No newline at end of file
diff --git a/providers/of/link/pom.xml b/providers/of/link/pom.xml
new file mode 100644
index 0000000..6f234d8
--- /dev/null
+++ b/providers/of/link/pom.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onlab.onos</groupId>
+        <artifactId>onos-of-providers</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>onos-of-provider-link</artifactId>
+    <packaging>bundle</packaging>
+
+    <description>ONOS OpenFlow protocol link provider</description>
+
+</project>
diff --git a/providers/of/link/src/main/java/org/onlab/onos/provider/of/link/impl/OpenFlowLinkProvider.java b/providers/of/link/src/main/java/org/onlab/onos/provider/of/link/impl/OpenFlowLinkProvider.java
new file mode 100644
index 0000000..8abcaac
--- /dev/null
+++ b/providers/of/link/src/main/java/org/onlab/onos/provider/of/link/impl/OpenFlowLinkProvider.java
@@ -0,0 +1,53 @@
+package org.onlab.onos.provider.of.link.impl;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.onos.net.link.LinkProvider;
+import org.onlab.onos.net.link.LinkProviderBroker;
+import org.onlab.onos.net.link.LinkProviderService;
+import org.onlab.onos.net.provider.AbstractProvider;
+import org.onlab.onos.net.provider.ProviderId;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Device provider which uses an OpenFlow controller to detect network
+ * infrastructure links.
+ */
+@Component
+public class OpenFlowLinkProvider extends AbstractProvider implements LinkProvider {
+
+    private final Logger log = LoggerFactory.getLogger(OpenFlowLinkProvider.class);
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected LinkProviderBroker providerBroker;
+
+    private LinkProviderService providerService;
+
+//    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+//    protected OpenFlowController controller;
+
+    /**
+     * Creates an OpenFlow link provider.
+     */
+    public OpenFlowLinkProvider() {
+        super(new ProviderId("org.onlab.onos.provider.of.link"));
+    }
+
+    @Activate
+    public void activate() {
+        providerService = providerBroker.register(this);
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        providerBroker.unregister(this);
+        providerService = null;
+        log.info("Stopped");
+    }
+
+}
diff --git a/providers/of/link/src/main/javadoc/org/onlab/onos/provider/of/link/impl/package.html b/providers/of/link/src/main/javadoc/org/onlab/onos/provider/of/link/impl/package.html
new file mode 100644
index 0000000..3307196
--- /dev/null
+++ b/providers/of/link/src/main/javadoc/org/onlab/onos/provider/of/link/impl/package.html
@@ -0,0 +1,3 @@
+<body>
+Provider that uses OpenFlow controller as a means of infrastructure link inference.
+</body>
\ No newline at end of file
diff --git a/providers/of/pom.xml b/providers/of/pom.xml
index 4958848..0722d71 100644
--- a/providers/of/pom.xml
+++ b/providers/of/pom.xml
@@ -18,6 +18,8 @@
 
     <modules>
         <module>device</module>
+        <module>link</module>
+        <module>host</module>
     </modules>
 
     <dependencies>