CatalogSource [operators.coreos.com/v1alpha1] - OperatorHub <strong>api</strong>s | <strong>api</strong> reference

Specification
api endpoints

Description

CatalogSource is a repository of CSVs, CRDs, and operator packages.

Type

object

Required

metadata
spec

Specification

Property Type Description

Property	Type	Description
`.apiVersion`	`string`	apiVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
`.kind`	`string`	Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
`.metadata`	`ObjectMeta meta/v1`	Standard object’s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
`.spec`	`object`
`.status`	`object`

.apiVersion

string

apiVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources

.kind

string

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds

.metadata

ObjectMeta meta/v1

Standard object’s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata

.spec

object

.status

object

.spec

Description

Type

object

Required

sourceType

Property Type Description

Property	Type	Description
`address`	`string`	Address is a host that OLM can use to connect to a pre-existing registry. Format: <registry-host or ip>:<port> Only used when SourceType = SourceTypeGrpc. Ignored when the Image field is set.
`configMap`	`string`	ConfigMap is the name of the ConfigMap to be used to back a configmap-server registry. Only used when SourceType = SourceTypeConfigmap or SourceTypeInternal.
`description`	`string`
`displayName`	`string`	Metadata
`icon`	`object`
`image`	`string`	Image is an operator-registry container image to instantiate a registry-server with. Only used when SourceType = SourceTypeGrpc. If present, the address field is ignored.
`publisher`	`string`
`secrets`	`array (string)`	Secrets represent set of secrets that can be used to access the contents of the catalog. It is best to keep this list small, since each will need to be tried for every catalog entry.
`sourceType`	`string`	SourceType is the type of source
`updateStrategy`	`object`	UpdateStrategy defines how updated catalog source images can be discovered Consists of an interval that defines polling duration and an embedded strategy type

address

string

Address is a host that OLM can use to connect to a pre-existing registry. Format: <registry-host or ip>:<port> Only used when SourceType = SourceTypeGrpc. Ignored when the Image field is set.

configMap

string

ConfigMap is the name of the ConfigMap to be used to back a configmap-server registry. Only used when SourceType = SourceTypeConfigmap or SourceTypeInternal.

description

string

displayName

string

Metadata

icon

object

image

string

Image is an operator-registry container image to instantiate a registry-server with. Only used when SourceType = SourceTypeGrpc. If present, the address field is ignored.

publisher

string

secrets

array (string)

Secrets represent set of secrets that can be used to access the contents of the catalog. It is best to keep this list small, since each will need to be tried for every catalog entry.

sourceType

string

SourceType is the type of source

updateStrategy

object

UpdateStrategy defines how updated catalog source images can be discovered Consists of an interval that defines polling duration and an embedded strategy type

.spec.icon

Description

Type

object

Required

base64data
mediatype

Property Type Description

Property	Type	Description
`base64data`	`string`
`mediatype`	`string`

base64data

string

mediatype

string

.spec.updateStrategy

Description: UpdateStrategy defines how updated catalog source images can be discovered Consists of an interval that defines polling duration and an embedded strategy type
Type: object

Property Type Description

Property	Type	Description
`registryPoll`	`object`

registryPoll

object

.spec.updateStrategy.registryPoll

Description
Type: object

Property Type Description

Property	Type	Description
`interval`	`string`	Interval is used to determine the time interval between checks of the latest catalog source version. The catalog operator polls to see if a new version of the catalog source is available. If available, the latest image is pulled and gRPC traffic is directed to the latest catalog source.

interval

string

Interval is used to determine the time interval between checks of the latest catalog source version. The catalog operator polls to see if a new version of the catalog source is available. If available, the latest image is pulled and gRPC traffic is directed to the latest catalog source.

.status

Description
Type: object

Property Type Description

Property	Type	Description
`configMapReference`	`object`
`connectionState`	`object`
`latestImageRegistryPoll`	`string`	The last time the CatalogSource image registry has been polled to ensure the image is up-to-date
`message`	`string`	A human readable message indicating details about why the ClusterServiceVersion is in this condition.
`reason`	`string`	Reason is the reason the Subscription was transitioned to its current state.
`registryService`	`object`

configMapReference

object

connectionState

object

latestImageRegistryPoll

string

The last time the CatalogSource image registry has been polled to ensure the image is up-to-date

message

string

A human readable message indicating details about why the ClusterServiceVersion is in this condition.

reason

string

Reason is the reason the Subscription was transitioned to its current state.

registryService

object

.status.configMapReference

Description

Type

object

Required

name
namespace

Property Type Description

Property	Type	Description
`lastUpdateTime`	`string`
`name`	`string`
`namespace`	`string`
`resourceVersion`	`string`
`uid`	`string`	UID is a type that holds unique ID values, including UUIDs. Because we don’t ONLY use UUIDs, this is an alias to string. Being a type captures intent and helps make sure that UIDs and names do not get conflated.

lastUpdateTime

string

name

string

namespace

string

resourceVersion

string

uid

string

UID is a type that holds unique ID values, including UUIDs. Because we don’t ONLY use UUIDs, this is an alias to string. Being a type captures intent and helps make sure that UIDs and names do not get conflated.

.status.connectionState

Description

Type

object

Required

lastObservedState

Property Type Description

Property	Type	Description
`address`	`string`
`lastConnect`	`string`
`lastObservedState`	`string`

address

string

lastConnect

string

lastObservedState

string

.status.registryService

Description
Type: object

Property Type Description

Property	Type	Description
`createdAt`	`string`
`port`	`string`
`protocol`	`string`
`serviceName`	`string`
`serviceNamespace`	`string`

createdAt

string

port

string

protocol

string

serviceName

string

serviceNamespace

string

api endpoints

The following api endpoints are available:

/apis/operators.coreos.com/v1alpha1/catalogsources
- GET: list objects of kind CatalogSource
/apis/operators.coreos.com/v1alpha1/namespaces/{namespace}/catalogsources
- DELETE: delete collection of CatalogSource
- GET: list objects of kind CatalogSource
- POST: create a CatalogSource
/apis/operators.coreos.com/v1alpha1/namespaces/{namespace}/catalogsources/{name}
- DELETE: delete a CatalogSource
- GET: read the specified CatalogSource
- PATCH: partially update the specified CatalogSource
- PUT: replace the specified CatalogSource
/apis/operators.coreos.com/v1alpha1/namespaces/{namespace}/catalogsources/{name}/status
- GET: read status of the specified CatalogSource
- PATCH: partially update status of the specified CatalogSource
- PUT: replace status of the specified CatalogSource

/apis/operators.coreos.com/v1alpha1/catalogsources

Table 1. Global guery parameters
Parameter	Type	Description
`allowWatchBookmarks`	`boolean`	allowWatchBookmarks requests watch events with type "BOOKMARK". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.
`continue`	`string`	The continue option should be set when retrieving more results from the server. Since this value is server defined, clients may only use the continue value from a previous query result with identical query parameters (except for the value of continue) and the server may reject a continue value it does not recognize. If the specified continue value is no longer valid whether due to expiration (generally five to fifteen minutes) or a configuration change on the server, the server will respond with a 410 ResourceExpired error together with a continue token. If the client needs a consistent list, it must restart their list without the continue field. Otherwise, the client may send another list request with the token received with the 410 error, the server will respond with a list starting from the next key, but from the latest snapshot, which is inconsistent from the previous list results - objects that are created, modified, or deleted after the first list request will be included in the response, as long as their keys are after the "next key". This field is not supported when watch is true. Clients may start a watch from the last resourceVersion value returned by the server and not miss any modifications.
`fieldSelector`	`string`	A selector to restrict the list of returned objects by their fields. Defaults to everything.
`labelSelector`	`string`	A selector to restrict the list of returned objects by their labels. Defaults to everything.
`limit`	`integer`	limit is a maximum number of responses to return for a list call. If more items exist, the server will set the `continue` field on the list metadata to a value that can be used with the same initial query to retrieve the next set of results. Setting a limit may return fewer than the requested amount of items (up to zero items) in the event all requested objects are filtered out and clients should only use the presence of the continue field to determine whether more results are available. Servers may choose not to support the limit argument and will return all of the available results. If limit is specified and the continue field is empty, clients may assume that no more results are available. This field is not supported if watch is true. The server guarantees that the objects returned when using continue will be identical to issuing a single list call without a limit - that is, no objects created, modified, or deleted after the first request is issued will be included in any subsequent continued requests. This is sometimes referred to as a consistent snapshot, and ensures that a client that is using limit to receive smaller chunks of a very large result can ensure they see all possible objects. If objects are updated during a chunked list the version of the object that was present at the time the first list result was calculated is returned.
`pretty`	`string`	If 'true', then the output is pretty printed.
`resourceVersion`	`string`	When specified with a watch call, shows changes that occur after that particular version of a resource. Defaults to changes from the beginning of history. When specified for list: - if unset, then the result is returned from remote storage based on quorum-read flag; - if it's 0, then we simply return what we currently have in cache, no guarantee; - if set to non zero, then the result is at least as fresh as given rv.
`timeoutSeconds`	`integer`	Timeout for the list/watch call. This limits the duration of the call, regardless of any activity or inactivity.
`watch`	`boolean`	Watch for changes to the described resources and return them as a stream of add, update, and remove notifications. Specify resourceVersion.

HTTP method: GET
Description: list objects of kind CatalogSource

Table 2. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSourceList operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty

/apis/operators.coreos.com/v1alpha1/namespaces/{namespace}/catalogsources

Table 3. Global path parameters
Parameter	Type	Description
`namespace`	`string`	object name and auth scope, such as for teams and projects

Table 4. Global guery parameters
Parameter	Type	Description
`pretty`	`string`	If 'true', then the output is pretty printed.

HTTP method: DELETE
Description: delete collection of CatalogSource

Table 5. Query parameters
Parameter	Type	Description
`allowWatchBookmarks`	`boolean`	allowWatchBookmarks requests watch events with type "BOOKMARK". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.
`continue`	`string`	The continue option should be set when retrieving more results from the server. Since this value is server defined, clients may only use the continue value from a previous query result with identical query parameters (except for the value of continue) and the server may reject a continue value it does not recognize. If the specified continue value is no longer valid whether due to expiration (generally five to fifteen minutes) or a configuration change on the server, the server will respond with a 410 ResourceExpired error together with a continue token. If the client needs a consistent list, it must restart their list without the continue field. Otherwise, the client may send another list request with the token received with the 410 error, the server will respond with a list starting from the next key, but from the latest snapshot, which is inconsistent from the previous list results - objects that are created, modified, or deleted after the first list request will be included in the response, as long as their keys are after the "next key". This field is not supported when watch is true. Clients may start a watch from the last resourceVersion value returned by the server and not miss any modifications.
`fieldSelector`	`string`	A selector to restrict the list of returned objects by their fields. Defaults to everything.
`labelSelector`	`string`	A selector to restrict the list of returned objects by their labels. Defaults to everything.
`limit`	`integer`	limit is a maximum number of responses to return for a list call. If more items exist, the server will set the `continue` field on the list metadata to a value that can be used with the same initial query to retrieve the next set of results. Setting a limit may return fewer than the requested amount of items (up to zero items) in the event all requested objects are filtered out and clients should only use the presence of the continue field to determine whether more results are available. Servers may choose not to support the limit argument and will return all of the available results. If limit is specified and the continue field is empty, clients may assume that no more results are available. This field is not supported if watch is true. The server guarantees that the objects returned when using continue will be identical to issuing a single list call without a limit - that is, no objects created, modified, or deleted after the first request is issued will be included in any subsequent continued requests. This is sometimes referred to as a consistent snapshot, and ensures that a client that is using limit to receive smaller chunks of a very large result can ensure they see all possible objects. If objects are updated during a chunked list the version of the object that was present at the time the first list result was calculated is returned.
`resourceVersion`	`string`	When specified with a watch call, shows changes that occur after that particular version of a resource. Defaults to changes from the beginning of history. When specified for list: - if unset, then the result is returned from remote storage based on quorum-read flag; - if it's 0, then we simply return what we currently have in cache, no guarantee; - if set to non zero, then the result is at least as fresh as given rv.
`timeoutSeconds`	`integer`	Timeout for the list/watch call. This limits the duration of the call, regardless of any activity or inactivity.
`watch`	`boolean`	Watch for changes to the described resources and return them as a stream of add, update, and remove notifications. Specify resourceVersion.

Table 6. HTTP responses
HTTP code	Reponse body
200 - OK	`Status meta/v1`
401 - Unauthorized	Empty

HTTP method: GET
Description: list objects of kind CatalogSource

Table 7. Query parameters
Parameter	Type	Description
`allowWatchBookmarks`	`boolean`	allowWatchBookmarks requests watch events with type "BOOKMARK". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.
`continue`	`string`	The continue option should be set when retrieving more results from the server. Since this value is server defined, clients may only use the continue value from a previous query result with identical query parameters (except for the value of continue) and the server may reject a continue value it does not recognize. If the specified continue value is no longer valid whether due to expiration (generally five to fifteen minutes) or a configuration change on the server, the server will respond with a 410 ResourceExpired error together with a continue token. If the client needs a consistent list, it must restart their list without the continue field. Otherwise, the client may send another list request with the token received with the 410 error, the server will respond with a list starting from the next key, but from the latest snapshot, which is inconsistent from the previous list results - objects that are created, modified, or deleted after the first list request will be included in the response, as long as their keys are after the "next key". This field is not supported when watch is true. Clients may start a watch from the last resourceVersion value returned by the server and not miss any modifications.
`fieldSelector`	`string`	A selector to restrict the list of returned objects by their fields. Defaults to everything.
`labelSelector`	`string`	A selector to restrict the list of returned objects by their labels. Defaults to everything.
`limit`	`integer`	limit is a maximum number of responses to return for a list call. If more items exist, the server will set the `continue` field on the list metadata to a value that can be used with the same initial query to retrieve the next set of results. Setting a limit may return fewer than the requested amount of items (up to zero items) in the event all requested objects are filtered out and clients should only use the presence of the continue field to determine whether more results are available. Servers may choose not to support the limit argument and will return all of the available results. If limit is specified and the continue field is empty, clients may assume that no more results are available. This field is not supported if watch is true. The server guarantees that the objects returned when using continue will be identical to issuing a single list call without a limit - that is, no objects created, modified, or deleted after the first request is issued will be included in any subsequent continued requests. This is sometimes referred to as a consistent snapshot, and ensures that a client that is using limit to receive smaller chunks of a very large result can ensure they see all possible objects. If objects are updated during a chunked list the version of the object that was present at the time the first list result was calculated is returned.
`resourceVersion`	`string`	When specified with a watch call, shows changes that occur after that particular version of a resource. Defaults to changes from the beginning of history. When specified for list: - if unset, then the result is returned from remote storage based on quorum-read flag; - if it's 0, then we simply return what we currently have in cache, no guarantee; - if set to non zero, then the result is at least as fresh as given rv.
`timeoutSeconds`	`integer`	Timeout for the list/watch call. This limits the duration of the call, regardless of any activity or inactivity.
`watch`	`boolean`	Watch for changes to the described resources and return them as a stream of add, update, and remove notifications. Specify resourceVersion.

Table 8. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSourceList operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty

HTTP method: POST
Description: create a CatalogSource

Table 9. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`fieldManager`	`string`	fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint.

Table 10. Body parameters
Parameter	Type	Description
`body`	`CatalogSource operators.coreos.com/v1alpha1`

Table 11. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSource operators.coreos.com/v1alpha1`
201 - Created	`CatalogSource operators.coreos.com/v1alpha1`
202 - Accepted	`CatalogSource operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty

/apis/operators.coreos.com/v1alpha1/namespaces/{namespace}/catalogsources/{name}

Table 12. Global path parameters
Parameter	Type	Description
`name`	`string`	name of the CatalogSource
`namespace`	`string`	object name and auth scope, such as for teams and projects

Table 13. Global guery parameters
Parameter	Type	Description
`pretty`	`string`	If 'true', then the output is pretty printed.

HTTP method: DELETE
Description: delete a CatalogSource

Table 14. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`gracePeriodSeconds`	`integer`	The duration in seconds before the object should be deleted. Value must be non-negative integer. The value zero indicates delete immediately. If this value is nil, the default grace period for the specified type will be used. Defaults to a per object value if not specified. zero means delete immediately.
`orphanDependents`	`boolean`	Deprecated: please use the PropagationPolicy, this field will be deprecated in 1.7. Should the dependent objects be orphaned. If true/false, the "orphan" finalizer will be added to/removed from the object's finalizers list. Either this field or PropagationPolicy may be set, but not both.
`propagationPolicy`	`string`	Whether and how garbage collection will be performed. Either this field or OrphanDependents may be set, but not both. The default policy is decided by the existing finalizer set in the metadata.finalizers and the resource-specific default policy. Acceptable values are: 'Orphan' - orphan the dependents; 'Background' - allow the garbage collector to delete the dependents in the background; 'Foreground' - a cascading policy that deletes all dependents in the foreground.

Table 15. Body parameters
Parameter	Type	Description
`body`	`DeleteOptions meta/v1`

Table 16. HTTP responses
HTTP code	Reponse body
200 - OK	`Status meta/v1`
202 - Accepted	`Status meta/v1`
401 - Unauthorized	Empty

HTTP method: GET
Description: read the specified CatalogSource

Table 17. Query parameters
Parameter	Type	Description
`resourceVersion`	`string`	When specified: - if unset, then the result is returned from remote storage based on quorum-read flag; - if it's 0, then we simply return what we currently have in cache, no guarantee; - if set to non zero, then the result is at least as fresh as given rv.

Table 18. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSource operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty

HTTP method: PATCH
Description: partially update the specified CatalogSource

Table 19. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`fieldManager`	`string`	fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint.

Table 20. Body parameters
Parameter	Type	Description
`body`	`Patch meta/v1`

Table 21. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSource operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty

HTTP method: PUT
Description: replace the specified CatalogSource

Table 22. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`fieldManager`	`string`	fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint.

Table 23. Body parameters
Parameter	Type	Description
`body`	`CatalogSource operators.coreos.com/v1alpha1`

Table 24. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSource operators.coreos.com/v1alpha1`
201 - Created	`CatalogSource operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty

/apis/operators.coreos.com/v1alpha1/namespaces/{namespace}/catalogsources/{name}/status

Table 25. Global path parameters
Parameter	Type	Description
`name`	`string`	name of the CatalogSource
`namespace`	`string`	object name and auth scope, such as for teams and projects

Table 26. Global guery parameters
Parameter	Type	Description
`pretty`	`string`	If 'true', then the output is pretty printed.

HTTP method: GET
Description: read status of the specified CatalogSource

Table 27. Query parameters
Parameter	Type	Description
`resourceVersion`	`string`	When specified: - if unset, then the result is returned from remote storage based on quorum-read flag; - if it's 0, then we simply return what we currently have in cache, no guarantee; - if set to non zero, then the result is at least as fresh as given rv.

Table 28. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSource operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty

HTTP method: PATCH
Description: partially update status of the specified CatalogSource

Table 29. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`fieldManager`	`string`	fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint.

Table 30. Body parameters
Parameter	Type	Description
`body`	`Patch meta/v1`

Table 31. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSource operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty

HTTP method: PUT
Description: replace status of the specified CatalogSource

Table 32. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`fieldManager`	`string`	fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint.

Table 33. Body parameters
Parameter	Type	Description
`body`	`CatalogSource operators.coreos.com/v1alpha1`

Table 34. HTTP responses
HTTP code	Reponse body
200 - OK	`CatalogSource operators.coreos.com/v1alpha1`
201 - Created	`CatalogSource operators.coreos.com/v1alpha1`
401 - Unauthorized	Empty