diff --git a/.gitignore b/.gitignore
index e6c8f4ea..ca4a25fe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@
 
 .gradle/
 .idea/
+.project/
 build/
 generated-protos/
 
diff --git a/.settings/org.eclipse.buildship.core.prefs b/.settings/org.eclipse.buildship.core.prefs
new file mode 100644
index 00000000..656b35a5
--- /dev/null
+++ b/.settings/org.eclipse.buildship.core.prefs
@@ -0,0 +1,13 @@
+arguments=
+auto.sync=false
+build.scans.enabled=false
+connection.gradle.distribution=GRADLE_DISTRIBUTION(WRAPPER)
+connection.project.dir=
+eclipse.preferences.version=1
+gradle.user.home=
+java.home=/usr/local/Cellar/openjdk/16.0.2/libexec/openjdk.jdk/Contents/Home
+jvm.arguments=
+offline.mode=false
+override.workspace.settings=true
+show.console.view=true
+show.executions.view=true
diff --git a/odpf/assets/bucket.proto b/odpf/assets/bucket.proto
new file mode 100644
index 00000000..a1fa851d
--- /dev/null
+++ b/odpf/assets/bucket.proto
@@ -0,0 +1,94 @@
+syntax = "proto3";
+
+package odpf.assets;
+
+option java_package = "io.odpf.assets";
+option java_outer_classname = "BucketProto";
+option go_package = "github.com/odpf/proton/assets";
+
+import "google/protobuf/timestamp.proto";
+
+import "odpf/assets/facets/ownership.proto";
+import "odpf/assets/facets/lineage.proto";
+import "odpf/assets/facets/properties.proto";
+
+import "odpf/assets/common/resource.proto";
+import "odpf/assets/common/timestamp.proto";
+import "odpf/assets/common/event.proto";
+
+message Bucket {
+  // Representation of the resource
+  odpf.assets.common.Resource resource = 1;
+
+  // The description of the bucket.
+  // Example: `This bucket was created by the product team.`
+  string description = 4;
+
+  // The location of the bucket. Can differ based on cloud storage used. (e.g. GCS, S3, etc)
+  // Example: `ASIA`
+  string location = 5;
+
+  // The type of the storage. Can differ based on cloud storage used. (e.g. GCS, S3, etc)
+  // Example: `STANDARD`
+  string storage_type = 6;
+
+  // List of blobs in the bucket.
+  repeated Blob blobs = 7;
+
+  // The ownership of the bucket.
+  // For an example check out ownership.
+  odpf.assets.facets.Ownership ownership = 31;
+
+  // List of the user's custom properties.
+  // Properties facet can be used to set custom properties, tags and labels for a user.
+  odpf.assets.facets.Properties properties = 32;
+
+  // The timestamp of the bucket's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a bucket.
+  odpf.assets.common.Timestamp timestamps = 33;
+
+  // The timestamp of the generated event.
+  // Event schemas is defined in the common event schema.
+  odpf.assets.common.Event event = 100;
+
+}
+
+message Blob {
+  // The URN of the blob.
+  // Example: `location/bucket-name/file-name`.
+  string urn = 1;
+
+  // The name of the blob.
+  // Example: `file-name`.
+  string name = 2;
+
+  // The source of the blob.
+  // Example: `gcs`.
+  string source = 3;
+
+  // The description of the blob.
+  // Example: `This is a config file for x app`
+  string description = 4;
+
+  // The length of the object content.
+  // Example: `300`
+  int64 size = 5;
+
+  // Delete time of the blob object.
+  google.protobuf.Timestamp delete_time = 6;
+
+  // Expire time of the blob object.
+  google.protobuf.Timestamp expire_time = 7;
+
+  // The ownership of the blob.
+  // For an example check out ownership.
+  odpf.assets.facets.Ownership ownership = 31;
+
+  // List of the user's custom properties.
+  // Properties facet can be used to set custom properties, tags and labels for a user.
+  odpf.assets.facets.Properties properties = 32;
+
+  // The timestamp of the blob's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a blob.
+  odpf.assets.common.Timestamp timestamps = 33;
+}
\ No newline at end of file
diff --git a/odpf/assets/common/event.proto b/odpf/assets/common/event.proto
new file mode 100644
index 00000000..ea8ffc87
--- /dev/null
+++ b/odpf/assets/common/event.proto
@@ -0,0 +1,26 @@
+syntax = "proto3";
+
+package odpf.assets.common;
+
+option java_package = "io.odpf.assets.common";
+option java_outer_classname = "EventProto";
+option go_package = "github.com/odpf/proton/assets/common";
+
+import "google/protobuf/timestamp.proto";
+
+// Event represents an event in the system.
+// Event is majorly used to represent the state of the system in the form of events.
+// It can be used in any schema which intend to produce events to message bus.
+message Event {
+  // The timestamp of the event.
+  // Example: `2018-01-01T00:00:00Z`.
+  google.protobuf.Timestamp timestamp = 1;
+  
+  // The activity that created the event. 
+  // Example: `create`, `update`.
+  string action = 2;
+
+  // The description of the event.
+  // Example: `user is created from signup form`.
+  string description = 3;
+}
diff --git a/odpf/assets/common/resource.proto b/odpf/assets/common/resource.proto
new file mode 100644
index 00000000..405ff02e
--- /dev/null
+++ b/odpf/assets/common/resource.proto
@@ -0,0 +1,32 @@
+syntax = "proto3";
+
+package odpf.assets.common;
+
+option java_package = "io.odpf.assets.common";
+option java_outer_classname = "ResourceProto";
+option go_package = "github.com/odpf/proton/assets/common";
+
+
+// Resource is a generic resource that represents a file or other resource.
+// It can be a table, job, user or group.
+message Resource {
+  // The unique identifier of the resource. 
+  // Example: `user:jdoe` or `group:accounting`.
+  string urn = 1;
+
+  // The name of the resource.
+  // Example: `John Doe` or `Accounting`.
+  string name = 2;
+
+  // The source of the resource.
+  // Example: `github` or `bigquery`.
+  string service = 3;
+
+  // The type of the asset.
+  // Example: `user` or `group`.
+  string type = 4;
+
+  // The REST URL for accessing the resource. URL returns the resource itself. 
+  // Example: `https://xyz.com/v1/users/user-123`
+  string url = 5;
+}
diff --git a/odpf/assets/common/timestamp.proto b/odpf/assets/common/timestamp.proto
new file mode 100644
index 00000000..df0e81d7
--- /dev/null
+++ b/odpf/assets/common/timestamp.proto
@@ -0,0 +1,28 @@
+syntax = "proto3";
+
+package odpf.assets.common;
+
+option java_package = "io.odpf.assets.common";
+option java_outer_classname = "TimestampProto";
+option go_package = "github.com/odpf/proton/assets/common";
+
+import "google/protobuf/timestamp.proto";
+
+// Timestamp represents created and modified timestamps.
+message Timestamp {
+  // The timestamp when the object was created.
+  google.protobuf.Timestamp create_time = 1;
+
+  // The timestamp when the object was last modified.
+  google.protobuf.Timestamp update_time = 2;
+}
+
+// A time window specified by its `start_time` and `end_time`.
+message TimeWindow {
+  // Start time of the time window (exclusive).
+  google.protobuf.Timestamp start_time = 1;
+
+  // End time of the time window (inclusive). If not specified, the current
+  // timestamp is used instead.
+  google.protobuf.Timestamp end_time = 2;
+}
\ No newline at end of file
diff --git a/odpf/assets/dashboard.proto b/odpf/assets/dashboard.proto
new file mode 100644
index 00000000..ea53be05
--- /dev/null
+++ b/odpf/assets/dashboard.proto
@@ -0,0 +1,109 @@
+syntax = "proto3";
+
+package odpf.assets;
+
+option java_package = "io.odpf.assets";
+option java_outer_classname = "DashboardProto";
+option go_package = "github.com/odpf/proton/assets";
+
+import "odpf/assets/facets/ownership.proto";
+import "odpf/assets/facets/lineage.proto";
+import "odpf/assets/facets/properties.proto";
+
+import "odpf/assets/common/resource.proto";
+import "odpf/assets/common/timestamp.proto";
+import "odpf/assets/common/event.proto";
+
+// Dashboard is a resource that represents a dashboard.
+message Dashboard {
+    // Representation of the resource
+  odpf.assets.common.Resource resource = 1;
+
+  // The description of the dashboard.
+  // Example: "This dashboard was created by the Metabase team."
+  string description = 4;
+
+  // The list of the charts in the dashboard.
+  // For an example, check the schema of the chart.
+  repeated Chart charts = 21;
+
+  // The ownership of the topic.
+  // For an example check out ownership.
+  odpf.assets.facets.Ownership ownership = 31;
+
+  // List of the user's custom properties.
+  // Properties facet can be used to set custom properties, tags and labels for a user.
+  odpf.assets.facets.Properties properties = 32;
+
+  // The timestamp of the user's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a user.
+  odpf.assets.common.Timestamp timestamps = 33;
+
+  // The timestamp of the generated event.
+  // Event schemas is defined in the common event schema.
+  odpf.assets.common.Event event = 100;
+
+}
+
+message Chart {
+  // The URN of the chart.
+  // Example: `chart:1`.
+  string urn = 1;
+
+  // The name of the chart.
+  // Example: `My Chart`.
+  string name = 2;
+
+  // The type of the chart.
+  // Example: `line`.
+  string type = 3;
+
+  // The source of the chart.
+  // Example: `metabase`.
+  string source = 4;
+
+  // The description of the chart.
+  // Example: `This is a chart for my dashboard.`
+  string description = 5;
+
+  // The url of the chart.
+  // Example: `http://metabase.com/charts/mychart`.
+  string url = 6;
+
+  // The raw query of the chart.
+  // Example: `SELECT * FROM my_table`.
+  string raw_query = 7;
+
+  // The source of the data.
+  // Example: `bigquery,graphite`.
+  string data_source = 8;
+
+  // The dashboard ur of the chart.
+  // Example: `dashboard:1`.
+  string dashboard_urn = 9;
+
+  // The source of the dashboard of the chart.
+  // Example: `metabase`.
+  string dashboard_source = 10;
+
+  // The ownership of the dashboard.
+  // For an example check out ownership.
+  odpf.assets.facets.Ownership ownership = 31;
+
+  // The lineage of the dashboard.
+  // For an example check out lineage schema.
+  odpf.assets.facets.Lineage lineage = 32;
+
+  // List of the user's custom properties.
+  // Properties facet can be used to set custom properties, tags and labels for a dashboard.
+  odpf.assets.facets.Properties properties = 33;
+
+  // The timestamp of the user's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a dashboard.
+  odpf.assets.common.Timestamp timestamps = 34;
+
+  // The timestamp of the generated event.
+  // Event schemas is defined in the common event schema.
+  odpf.assets.common.Event event = 100;
+
+}
diff --git a/odpf/assets/facets/lineage.proto b/odpf/assets/facets/lineage.proto
new file mode 100644
index 00000000..05366106
--- /dev/null
+++ b/odpf/assets/facets/lineage.proto
@@ -0,0 +1,21 @@
+syntax = "proto3";
+
+package odpf.assets.facets;
+
+option java_package = "io.odpf.assets.facets";
+option java_outer_classname = "LineageProto";
+option go_package = "github.com/odpf/proton/assets/facets";
+
+import "odpf/assets/common/resource.proto";
+
+// Linage reprsents the relationship of resource to other resources.
+// Relation is way of describing the relationship between two resources.
+message Lineage {
+  // The resource that is the source of the relationship.
+  // Example: a resource that is the parent of another resource.
+  repeated odpf.assets.common.Resource upstreams = 1;
+
+  // The resource that is the destination of the relationship.
+  // Example: a resource that is the child of another resource.
+  repeated odpf.assets.common.Resource downstreams = 2;
+}
diff --git a/odpf/assets/facets/ownership.proto b/odpf/assets/facets/ownership.proto
new file mode 100644
index 00000000..a3f57e21
--- /dev/null
+++ b/odpf/assets/facets/ownership.proto
@@ -0,0 +1,31 @@
+syntax = "proto3";
+
+package odpf.assets.facets;
+
+option java_package = "io.odpf.assets.facets";
+option java_outer_classname = "OwnershipProto";
+option go_package = "github.com/odpf/proton/assets/facets";
+
+import "odpf/assets/common/resource.proto";
+
+// Ownership is a facet that describes the ownership of a resource.
+message Ownership {
+  // Requird: The list of owners of the resource.
+  // For an example check the owner schema.
+  repeated Owner owners = 7;
+}
+
+// Owner is a facet that describes the owner of a resource.
+message Owner {
+  // The name of the owner.
+  // Example: `user:johndoe`.
+
+  string urn = 1;
+  // The name of the owner.
+  // Example: `John Doe`.
+  string name = 2;
+  
+  // The role of the owner.
+  // Example: `admin`, `steward`.
+  string role = 3;
+}
\ No newline at end of file
diff --git a/odpf/assets/facets/properties.proto b/odpf/assets/facets/properties.proto
new file mode 100644
index 00000000..1fc71522
--- /dev/null
+++ b/odpf/assets/facets/properties.proto
@@ -0,0 +1,22 @@
+syntax = "proto3";
+
+package odpf.assets.facets;
+
+option java_package = "io.odpf.assets.facets";
+option java_outer_classname = "PropertiesProto";
+option go_package = "github.com/odpf/proton/assets/facets";
+
+import "google/protobuf/struct.proto";
+
+message Properties {
+
+  // Optional: List of tags the user has.
+  repeated string tags = 1;
+
+  //Optional. List of labels the user has.
+  map<string,string> labels = 2;
+
+  // Optional: List of properties the user has.
+  google.protobuf.Struct attributes = 3;
+ 
+}
\ No newline at end of file
diff --git a/odpf/assets/facets/schema.proto b/odpf/assets/facets/schema.proto
new file mode 100644
index 00000000..276c4b00
--- /dev/null
+++ b/odpf/assets/facets/schema.proto
@@ -0,0 +1,64 @@
+syntax = "proto3";
+
+package odpf.assets.facets;
+
+option java_package = "io.odpf.assets.facets";
+option java_outer_classname = "SchemaProto";
+option go_package = "github.com/odpf/proton/assets/facets";
+
+
+import "odpf/assets/facets/properties.proto";
+
+// Columns represents a list of columns.
+// It is facet used to specify the schema of a table or a file.
+message Columns {
+  // The list of columns.
+  repeated Column columns = 1;
+}
+
+// Column represents a column in a table or a file.
+message Column {
+  // The name of the column.
+  // Example: `customer_id`.
+  string name = 1;
+
+  // The description of the column.
+  // Example: `The unique id of the customer`
+  string description = 2;
+
+  // The data type of the column.
+  // Example: `INT64`.
+
+  string data_type = 3;
+  // The format of the column.
+  // Example: `true`.
+  bool is_nullable = 4;
+
+  // The length of the column.
+  // Example: `10`.
+  int64 length = 5;
+
+  // The profile of the column.
+  ColumnProfile profile = 6;
+
+  // Representation of the column properties.
+  // Properties facet can be used to set custom properties, tags and labels for a column.
+  odpf.assets.facets.Properties properties = 31;
+}
+
+message ColumnProfile {
+  string min = 1;
+  string max = 2;
+  double avg = 3;
+  double med = 4;
+  int64 unique = 5;
+  int64 count = 6;
+  string top = 7;
+}
+
+// TopicSchema represents a schema for message bus.
+// It is facet used to specify the schema of a message bus.
+message TopicSchema {
+  string schema_url = 1;
+  string format = 2;
+}
diff --git a/odpf/assets/group.proto b/odpf/assets/group.proto
new file mode 100644
index 00000000..b17678b4
--- /dev/null
+++ b/odpf/assets/group.proto
@@ -0,0 +1,50 @@
+syntax = "proto3";
+
+package odpf.assets;
+
+option java_package = "io.odpf.assets";
+option java_outer_classname = "GroupProto";
+option go_package = "github.com/odpf/proton/assets";
+
+
+import "odpf/assets/common/timestamp.proto";
+import "odpf/assets/common/event.proto";
+import "odpf/assets/common/resource.proto";
+
+import "odpf/assets/facets/properties.proto";
+
+// Group represents a group of users and resources.
+message Group {
+  // Representation of the resource
+  odpf.assets.common.Resource resource = 1;
+
+  // The email of the group.
+  // Example: `xyz@xyz.com`
+  string email = 3;
+
+  // The members of the group.
+  // For example look at schema of the member.
+  repeated Member members = 21;
+
+  // List of the user's custom properties.
+  // Properties facet can be used to set custom properties, tags and labels for a user.
+  odpf.assets.facets.Properties properties = 31;
+
+  // The timestamp of the user's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a user.
+  odpf.assets.common.Timestamp timestamps = 32;
+
+  // The timestamp of the generated event.
+  // Event schemas is defined in the common event schema.
+  odpf.assets.common.Event event = 100;
+}
+
+// Member represents a user.
+message Member {
+  // The unique identifier for the user.
+  // Example: `user:example`.
+  string urn = 1;
+  // The role of the user.
+  // Example: `owner`.
+  string role = 2;
+}
\ No newline at end of file
diff --git a/odpf/assets/job.proto b/odpf/assets/job.proto
new file mode 100644
index 00000000..718315f9
--- /dev/null
+++ b/odpf/assets/job.proto
@@ -0,0 +1,45 @@
+syntax = "proto3";
+
+package odpf.assets;
+
+option java_package = "io.odpf.assets";
+option java_outer_classname = "JobProto";
+option go_package = "github.com/odpf/proton/assets";
+
+import "odpf/assets/facets/ownership.proto";
+import "odpf/assets/facets/lineage.proto";
+import "odpf/assets/facets/properties.proto";
+
+import "odpf/assets/common/resource.proto";
+import "odpf/assets/common/timestamp.proto";
+import "odpf/assets/common/event.proto";
+
+// Job is a resource that represents a job.
+message Job {
+  // Representation of the resource
+  odpf.assets.common.Resource resource = 1;
+
+  // The description of the job.
+  // Example: 'This job is used to process data from a stream.'
+  string description = 5;
+
+  // The ownership of the topic.
+  // For an example check out ownership.
+  odpf.assets.facets.Ownership ownership = 31;
+
+  // The lineage of the topic.
+  // For an example check out lineage schema.
+  odpf.assets.facets.Lineage lineage = 32;
+
+  // List of the user's custom properties.
+  // Properties facet can be used to set custom properties, tags and labels for a user.
+  odpf.assets.facets.Properties properties = 33;
+
+  // The timestamp of the user's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a user.
+  odpf.assets.common.Timestamp timestamps = 34;
+
+  // The timestamp of the generated event.
+  // Event schemas is defined in the common event schema.
+  odpf.assets.common.Event event = 100;
+}
\ No newline at end of file
diff --git a/odpf/assets/table.proto b/odpf/assets/table.proto
new file mode 100644
index 00000000..f42b7581
--- /dev/null
+++ b/odpf/assets/table.proto
@@ -0,0 +1,68 @@
+syntax = "proto3";
+
+package odpf.assets;
+
+option java_package = "io.odpf.assets";
+option java_outer_classname = "TableProto";
+option go_package = "github.com/odpf/proton/assets";
+
+import "odpf/assets/facets/schema.proto";
+import "odpf/assets/facets/ownership.proto";
+import "odpf/assets/facets/lineage.proto";
+import "odpf/assets/facets/properties.proto";
+
+import "odpf/assets/common/resource.proto";
+import "odpf/assets/common/timestamp.proto";
+import "odpf/assets/common/event.proto";
+
+// Table is a table in a database.
+// It can be a file, a table, a view, a materialized view, a temporary table, or a virtual table.
+message Table {
+  // Representation of the resource
+  odpf.assets.common.Resource resource = 1;
+
+  // The description of the table.
+  // Example: 'My User table'.
+  string description = 4;
+
+  // The metrics about the table.
+  // For example check the profile schem.
+  TableProfile profile = 21;
+
+  // The columns of the table.
+  // Example: 'id', `name`, `age'.
+  odpf.assets.facets.Columns schema = 22;
+
+  // The ownership of the topic.
+  // For an example check out ownership.
+  odpf.assets.facets.Ownership ownership = 31;
+
+  // The lineage of the topic.
+  // For an example check out lineage schema.
+  odpf.assets.facets.Lineage lineage = 32;
+
+  // List of the user's custom properties.
+  // Properties facet can be used to set custom properties, tags and labels for a user.
+  odpf.assets.facets.Properties properties = 33;
+
+  // The timestamp of the user's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a user.
+  odpf.assets.common.Timestamp timestamps = 34;
+
+  // The timestamp of the generated event.
+  // Event schemas is defined in the common event schema.
+  odpf.assets.common.Event event = 100;
+}
+
+// TableProfile is the metrics about the table.
+message TableProfile {
+  // The number of rows in the table.
+  // Example: `100`.
+  int64 total_rows = 1;
+
+  // The number of rows in the table that are not deleted.
+  // Example: `event_timestamp`.
+  string partition_key = 2;
+
+  string partition_value = 3;
+}
diff --git a/odpf/assets/topic.proto b/odpf/assets/topic.proto
new file mode 100644
index 00000000..dbcdf703
--- /dev/null
+++ b/odpf/assets/topic.proto
@@ -0,0 +1,66 @@
+syntax = "proto3";
+
+package odpf.assets;
+
+option java_package = "io.odpf.assets";
+option java_outer_classname = "TopicProto";
+option go_package = "github.com/odpf/proton/assets";
+
+import "odpf/assets/facets/schema.proto";
+import "odpf/assets/facets/ownership.proto";
+import "odpf/assets/facets/lineage.proto";
+import "odpf/assets/facets/properties.proto";
+
+import "odpf/assets/common/resource.proto";
+import "odpf/assets/common/timestamp.proto";
+import "odpf/assets/common/event.proto";
+
+// Topic is resource that represents a logical group of messages 
+// in message bus like kafka, pubsub, pulsar etc.
+message Topic {
+  // Representation of the resource
+  odpf.assets.common.Resource resource = 1;
+
+  // The description of the topic.
+  // Example: 'This is a topic for my application'.
+  string description = 4;
+
+  // The metrics of the topic.
+  // For an example check out topic profile schema.
+  TopicProfile profile = 21;
+
+  // The schama of the topic.
+  // For an example check out topic schema.
+  odpf.assets.facets.TopicSchema schema = 31;
+
+  // The ownership of the topic.
+  // For an example check out ownership.
+  odpf.assets.facets.Ownership ownership = 32;
+
+  // The lineage of the topic.
+  // For an example check out lineage schema.
+  odpf.assets.facets.Lineage lineage = 33;
+
+  // List of the user's custom properties.
+  // Properties facet can be used to set custom properties, tags and labels for a user.
+  odpf.assets.facets.Properties properties = 34;
+
+  // The timestamp of the user's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a user.
+  odpf.assets.common.Timestamp timestamps = 35;
+
+  // The timestamp of the generated event.
+  // Event schemas is defined in the common event schema.
+  odpf.assets.common.Event event = 100;
+}
+
+// TopicProfile is the profile of the topic.
+message TopicProfile {
+  // The thrroughput of the topic.
+  // Example: `1m/minute`.
+  string throughput = 1;
+
+  // The number of partitions in the topic.
+  // Example: `12`.
+  int64 number_of_partitions = 2;
+}
diff --git a/odpf/assets/user.proto b/odpf/assets/user.proto
new file mode 100644
index 00000000..1a18db0c
--- /dev/null
+++ b/odpf/assets/user.proto
@@ -0,0 +1,104 @@
+syntax = "proto3";
+
+package odpf.assets;
+
+option java_package = "io.odpf.assets";
+option java_outer_classname = "UserProto";
+option go_package = "github.com/odpf/proton/assets";
+
+
+import "odpf/assets/common/timestamp.proto";
+import "odpf/assets/common/event.proto";
+import "odpf/assets/common/resource.proto";
+
+import "odpf/assets/facets/properties.proto";
+
+// User is a person who uses or operates something. 
+// It can be a user of the system, or a user of a device.
+// User is a resource that represents a user.
+message User {
+  // Representation of the resource
+  odpf.assets.common.Resource resource = 1;
+
+  // The emai address of the user.
+  // Example: `job.deo@gmail.com`
+  string email = 3;
+
+  // The username of the user.
+  // Example: `johndoe`
+  string username = 4;
+
+  // The first name of the user.
+  // Example: `john`
+  string first_name = 5;
+
+  // The last name of the user.
+  // Example: `doe`
+  string last_name = 6;
+  
+  // The full name of the user.
+  // Example: `john mayer doe`
+  string full_name = 7;
+
+  // The display name of the user.
+  // Example: `John M. Doe`
+  string display_name = 8;
+
+  // The job title of the user,
+  // Example: `data engineer`
+  string title = 9;
+
+  // The status of the user.
+  // Example: `active`
+  string status = 10;
+
+  // The email of the manger of the user.
+  // Example: `rambo.ryan@gmail.com`
+  string manager_email = 11;
+
+  // List of the user social media accounts.
+  // For an example check out the profile schema.
+  repeated Profile profiles = 21;
+
+  // List of the groups user belongs to.
+  // A user can be part of multiple groups and have a different role in every group.
+  repeated Membership memberships = 22;
+
+  // Representation of custom properties of user.
+  // Properties facet can be used to set custom properties, tags and labels for a user.
+  odpf.assets.facets.Properties properties = 31;
+
+  // The timestamp of the user's creation.
+  // Timstamp facet can be used to set the creation and updation timestamp of a user.
+  odpf.assets.common.Timestamp timestamps = 32;
+
+  // The timestamp of the generated event.
+  // Event schemas is defined in the common event schema.
+  odpf.assets.common.Event event = 100;
+}
+
+// Membership is a relationship between a user and a group.
+message Membership {
+  // The unique identifier of the group.
+  // Example: `group:mygroup`
+  string group_urn = 1;
+
+  // The role user has in the group.
+  // Example: "owner"
+  repeated string role = 2;
+}
+
+// Profile is a social media account of the user.
+message Profile {
+  // The unique identifier of the profile.
+  // Example: `profile:jdoe`
+  string id = 1;
+
+  // The type of the profile.
+  // Example: `github`
+  string platform = 2;
+
+  // The url of the profile.
+  // Example: `http://github.com/jdoe`
+  string url = 3;
+}
diff --git a/odpf/guardian/guardian.proto b/odpf/guardian/guardian.proto
new file mode 100644
index 00000000..b6aed6df
--- /dev/null
+++ b/odpf/guardian/guardian.proto
@@ -0,0 +1,375 @@
+syntax = "proto3";
+package odpf.guardian;
+
+import "odpf/third_party/googleapis/google/api/annotations.proto";
+import "odpf/third_party/grpc-gateway/protoc-gen-openapiv2/options/annotations.proto";
+import "google/protobuf/struct.proto";
+import "google/protobuf/timestamp.proto";
+
+option go_package = "github.com/odpf/proton/guardian";
+option java_multiple_files = true;
+option java_package = "io.odpf.proton.guardian";
+option java_outer_classname = "ServiceManager";
+
+// These annotations are used when generating the OpenAPI file.
+option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_swagger) = {
+    info: {
+        version: "0.1";
+    };
+    external_docs: {
+        description: "Guardian server";
+    }
+    schemes: HTTP;
+};
+
+// WARNING: This is still in active development and can have breaking changes
+service Guardian {
+    rpc ListProviders(ListProvidersRequest) returns (ListProvidersResponse) {
+        option (google.api.http) = {
+            get: "/providers"
+        };
+    }
+
+    rpc CreateProvider(CreateProviderRequest) returns (CreateProviderResponse) {
+        option (google.api.http) = {
+            post: "/providers"
+            body: "*"
+        };
+    }
+
+    rpc UpdateProvider(UpdateProviderRequest) returns (UpdateProviderResponse) {
+        option (google.api.http) = {
+            put: "/providers/{id}"
+            body: "*"
+        };
+    }
+
+    rpc ListPolicies(ListPoliciesRequest) returns (ListPoliciesResponse) {
+        option (google.api.http) = {
+            get: "/policies"
+        };
+    }
+
+    rpc CreatePolicy(CreatePolicyRequest) returns (CreatePolicyResponse) {
+        option (google.api.http) = {
+            post: "/policies"
+            body: "*"
+        };
+    }
+
+    rpc UpdatePolicy(UpdatePolicyRequest) returns (UpdatePolicyResponse) {
+        option (google.api.http) = {
+            put: "/policies/{id}"
+            body: "*"
+        };
+    }
+
+    rpc ListResources(ListResourcesRequest) returns (ListResourcesResponse) {
+        option (google.api.http) = {
+            get: "/resources"
+        };
+    }
+
+    rpc UpdateResource(UpdateResourceRequest) returns (Resource) {
+        option (google.api.http) = {
+            put: "/resources/{id}"
+            body: "*"
+        };
+    }
+
+    rpc ListAppeals(ListAppealsRequest) returns (ListAppealsResponse) {
+        option (google.api.http) = {
+            get: "/appeals"
+        };
+    }
+
+    rpc GetAppeal(GetAppealRequest) returns (GetAppealResponse) {
+        option (google.api.http) = {
+            get: "/appeals/{id}"
+        };
+    }
+
+    rpc CancelAppeal(CancelAppealRequest) returns (CancelAppealResponse) {
+        option (google.api.http) = {
+            put: "/appeals/{id}/cancel"
+        };
+    }
+
+    rpc RevokeAppeal(RevokeAppealRequest) returns (RevokeAppealResponse) {
+        option (google.api.http) = {
+            put: "/appeals/{id}/revoke"
+        };
+    }
+
+    rpc CreateAppeal(CreateAppealRequest) returns (CreateAppealResponse) {
+        option (google.api.http) = {
+            post: "/appeals"
+            body: "*"
+        };
+    }
+
+    rpc ListApprovals(ListApprovalsRequest) returns (ListApprovalsResponse) {
+        option (google.api.http) = {
+            get: "/appeals/approvals"
+        };
+    }
+
+    rpc UpdateApproval(UpdateApprovalRequest) returns (UpdateApprovalResponse) {
+        option (google.api.http) = {
+            post: "/appeals/{id}/approvals/{approval_name}"
+            body: "*"
+        };
+    }
+}
+
+message ListProvidersRequest {}
+
+message ListProvidersResponse {
+    repeated Provider providers = 1;
+}
+
+message CreateProviderRequest {
+    Provider provider = 1;
+}
+
+message CreateProviderResponse {
+    Provider provider = 1;
+}
+
+message UpdateProviderRequest {
+    uint32 id = 1;
+    Provider provider = 2;
+}
+
+message UpdateProviderResponse {
+    Provider provider = 1;
+}
+
+message ListPoliciesRequest {}
+
+message ListPoliciesResponse {
+    repeated Policy policies = 1;
+}
+
+message CreatePolicyRequest {
+    Policy policy = 1;
+}
+
+message CreatePolicyResponse {
+    Policy policy = 1;
+}
+
+message UpdatePolicyRequest {
+    string id = 1;
+    Policy policy = 2;
+}
+
+message UpdatePolicyResponse {
+    Policy policy = 1;
+}
+
+message ListResourcesRequest {}
+
+message ListResourcesResponse {
+    repeated Resource resources = 1;
+}
+
+message UpdateResourceRequest {
+    uint32 id = 1;
+    Resource resource = 2;
+}
+
+message ListAppealsRequest {
+    string user = 1;
+}
+
+message ListAppealsResponse {
+    repeated Appeal appeals = 1;
+}
+
+message GetAppealRequest {
+    uint32 id = 1;
+}
+
+message GetAppealResponse {
+    Appeal appeal = 1;
+}
+
+message CancelAppealRequest {
+    uint32 id = 1;
+}
+
+message CancelAppealResponse {
+    Appeal appeal = 1;
+}
+
+message RevokeAppealRequest {
+    uint32 id = 1;
+}
+
+message RevokeAppealResponse {
+    Appeal appeal = 1;
+}
+
+message CreateAppealRequest {
+    string user = 1;
+
+    message Resource {
+        uint32 id = 1;
+        string role = 2;
+        google.protobuf.Struct options = 3;
+    }
+    repeated Resource resources = 2;
+}
+
+message CreateAppealResponse {
+    repeated Appeal appeals = 1;
+}
+
+message ListApprovalsRequest {
+    string user = 1;
+}
+
+message ListApprovalsResponse {
+    repeated Approval approvals = 1;
+}
+
+message UpdateApprovalRequest {
+    uint32 id = 1;
+    string approval_name = 2;
+
+    message Action {
+        string action = 1;
+    }
+    Action action = 3;
+}
+
+message UpdateApprovalResponse {
+    Appeal appeal = 1;
+}
+
+// Provider contains information about external data provider such as BigQuery, Metabase, etc., credentials, policy, and allowed roles 
+message Provider {
+    uint32 id = 1;
+    string type = 2;
+    string urn = 3;
+
+    message ProviderConfig {
+        string type = 1;
+        string urn = 2;
+        google.protobuf.Struct labels = 3;
+        google.protobuf.Value credentials = 4;
+
+        message AppealConfig {
+            bool allow_permanent_access = 1;
+            string allow_active_access_extension_in = 2;
+        }
+        AppealConfig appeal = 5;
+
+        message ResourceConfig {
+            string type = 1;
+
+            message PolicyConfig {
+                string id = 1;
+                int32 version = 2;
+            }
+            PolicyConfig policy = 2;
+
+            message RoleConfig {
+                string id = 1;
+                string name = 2;
+                string description = 3;
+                repeated google.protobuf.Value permissions = 4;
+            }
+            repeated RoleConfig roles = 3;
+        }
+        ResourceConfig resources = 6;
+    }
+    ProviderConfig config = 4;
+
+    google.protobuf.Timestamp created_at = 5;
+    google.protobuf.Timestamp updated_at = 6;
+}
+
+// Policy is a configurable steps for appeal's approval
+message Policy {
+    string id = 1;
+    uint32 version = 2;
+    string description = 3;
+
+    message ApprovalStep {
+        string name = 1;
+        string description = 2;  // optional
+
+        message Condition {
+            string field = 1;
+
+            message MatchCondition {
+                google.protobuf.Value eq = 1;
+            }
+            MatchCondition match = 2;
+        }
+        repeated Condition conditions = 3;  // optional
+
+        bool allow_failed = 4;             // optional
+        repeated string dependencies = 5;  // optional
+        string approvers = 6;              // optional
+    }
+    repeated ApprovalStep steps = 4;
+
+    google.protobuf.Struct labels = 5;
+    google.protobuf.Timestamp created_at = 6;
+    google.protobuf.Timestamp updated_at = 7;
+}
+
+// Appeal is created by user to get access to one or more resources
+message Appeal {
+    uint32 id = 1;
+    uint32 resource_id = 2;
+    string policy_id = 3;
+    uint32 policy_version = 4;
+    string status = 5;
+    string user = 6;
+    string role = 7;
+
+    message AppealOptions {
+        google.protobuf.Timestamp expiration_date = 1;  // optional
+    }
+    AppealOptions options = 8;  // optional
+
+    google.protobuf.Struct labels = 9;
+    Resource resource = 10;  // optional
+    repeated Approval approvals = 11;
+
+    google.protobuf.Timestamp created_at = 12;
+    google.protobuf.Timestamp updated_at = 13;
+}
+
+// Approval is an approval item that generated in an appeal based on the selected policy
+message Approval {
+    uint32 id = 1;
+    string name = 2;
+    uint32 appeal_id = 3;
+    string status = 4;
+    string actor = 5;
+    string policy_id = 6;
+    uint32 policy_version = 7;
+    repeated string approvers = 8;
+    Appeal appeal = 9;
+    google.protobuf.Timestamp created_at = 10;
+    google.protobuf.Timestamp updated_at = 11;
+}
+
+// Resource contains information of resource from providers
+message Resource {
+    uint32 id = 1;
+    string provider_type = 2;
+    string provider_urn = 3;
+    string type = 4;
+    string urn = 5;
+    string name = 6;
+    google.protobuf.Struct details = 7;
+    google.protobuf.Struct labels = 8;
+    google.protobuf.Timestamp created_at = 9;
+    google.protobuf.Timestamp updated_at = 10;
+}
\ No newline at end of file
diff --git a/odpf/metadata/dataset.proto b/odpf/metadata/dataset.proto
new file mode 100644
index 00000000..9cb3617b
--- /dev/null
+++ b/odpf/metadata/dataset.proto
@@ -0,0 +1,5 @@
+syntax = "proto3";
+
+message Dataset {
+
+}
\ No newline at end of file