Legacy Product

Fusion 5.10
    Fusion 5.10

    Web V1 Connector Configuration Reference

    Table of Contents

    The Web V1 connector retrieves data from a Web site using HTTP and starting from a specified URL.

    V1 deprecation and removal notice

    Starting in Fusion 5.12.0, all V1 connectors are deprecated. This means they are no longer being actively developed and will be removed in Fusion 5.13.0.

    The replacement for this connector is the Web V2 connector.

    If you are using this connector, you must migrate to the replacement connector or a supported alternative before upgrading to Fusion 5.13.0. We recommend migrating to the replacement connector as soon as possible to avoid any disruption to your workflows.

    Crawl options

    Configuration

    When entering configuration values in the UI, use unescaped characters, such as \t for the tab character. When entering configuration values in the API, use escaped characters, such as \\t for the tab character.

    If you experience CrawlDB errors such as "File is already opened and is locked", then raise the Alias Expiration setting.

    Connector for websites and web-based content resources.

    description - string

    Optional description for this datasource.

    id - stringrequired

    Unique name for this datasource.

    >= 1 characters

    Match pattern: ^[a-zA-Z0-9_-]+$

    parserId - string

    Parser used when parsing raw content. Retry parsing setting is available under crawl performance (advance setting)

    Default: _system

    pipeline - stringrequired

    Name of an existing index pipeline for processing documents.

    >= 1 characters

    properties - Properties

    Datasource configuration properties

    aliasExpiration - integer

    The number of crawls after which an alias will expire. The default is 1 crawl.

    Default: 1

    chunkSize - integer

    The number of items to batch for each round of fetching. A higher value can make crawling faster, but memory usage is also increased. The default is 1.

    Default: 1

    crawlDBType - string

    The type of crawl database to use, in-memory or on-disk.

    Default: in-memory

    Allowed values: in-memoryon-disk

    db - Connector DB

    Type and properties for a ConnectorDB implementation to use with this datasource.

    aliases - boolean

    Keep track of original URI-s that resolved to the current URI. This negatively impacts performance and size of DB.

    Default: false

    inlinks - boolean

    Keep track of incoming links. This negatively impacts performance and size of DB.

    Default: false

    inv_aliases - boolean

    Keep track of target URI-s that the current URI resolves to. This negatively impacts performance and size of DB.

    Default: false

    type - string

    Fully qualified class name of ConnectorDb implementation.

    >= 1 characters

    Default: com.lucidworks.connectors.db.impl.MapDbConnectorDb

    dedupe - boolean

    If true, documents will be deduplicated. Deduplication can be done based on an analysis of the content, on the content of a specific field, or by a JavaScript function. If neither a field nor a script are defined, content analysis will be used.

    Default: false

    dedupeField - string

    Field to be used for dedupe. Define either a field or a dedupe script, otherwise the full raw content of each document will be used.

    dedupeSaveSignature - boolean

    If true,the signature used for dedupe will be stored in a 'dedupeSignature_s' field. Note this may cause errors about 'immense terms' in that field.

    Default: false

    dedupeScript - string

    Custom javascript to dedupe documents. The script must define a 'genSignature(content){}' function, but can use any combination of document fields. The function must return a string.

    delete - boolean

    Set to true to remove documents from the index when they can no longer be accessed as unique documents.

    Default: true

    delete404 - boolean

    Select this option to delete indexed pages that return a 404 or 410 error.

    Default: true

    deleteErrorsAfter - integer

    Number of fetch failures to tolerate before removing a document from the index. The default of -1 means no fetch failures will be removed.

    Default: -1

    depth - integer

    Number of levels in a directory or site tree to descend for documents.

    Default: -1

    diagnosticMode - boolean

    Enable to print more detailed information to the logs about each request.

    Default: false

    emitThreads - integer

    The number of threads used to send documents from the connector to the index pipeline. The default is 5.

    Default: 5

    excludeExtensions - array[string]

    File extensions that should not to be fetched. This will limit this datasource to all extensions except this list.

    excludeRegexes - array[string]

    Regular expressions for URI patterns to exclude. This will limit this datasource to only URIs that do not match the regular expression.

    f.addedHeaders - string

    Add these headers to http requests. This is useful for web sites that require certain headers in order to allow you to use them. Each header should on its own line and be of format HeaderName: HeaderValue

    f.allowAllCertificates - boolean

    If false, security checks will be performed on all SSL/TLS certificate signers and origins. This means self-signed certificates would not be supported.

    Default: false

    f.appendTrailingSlashToLinks - boolean

    If true, a trailing '/' will be added to link URLs when the URL does not end in a dot ('.').

    Default: false

    f.basicAuth - array[object]

    Settings for Basic authentication

    object attributes:{host required : {
     display name: Host
     type: string
    }
    id : {
     display name: Auth Config id
     type: string
    }
    password : {
     display name: Password
     type: string
    }
    port required : {
     display name: Port
     type: integer
    }
    realm : {
     display name: Realm
     type: string
    }
    userName : {
     display name: User
     type: string
    }
    }

    f.bulkStartLinks - string

    If a large number of start links must be defined, you can provide them here. One link per line.

    f.canonicalTagsRedirectLimit - integer

    Because canonical tag resolution may be cyclical, a limit must be applied to the total number of requests. This value ensures that the resolution finishes in a reasonable amount of time.

    Default: 4

    f.chromeBinaryPath - string

    Applicable only when "Evaluate JavaScript" and "Use Google Chrome" are both selected, specify a Chrome executable path to use. For example: "/home/myuser/Downloads/chromium/chrome". If not specified, chromedriver will find chrome in typically installed system location(s) and as a last resort will try to use environment variable. See also link:/how-to/91cqgt/troubleshoot-chrome-binary-for-web-connector[troubleshooting Chrome binary].

    f.chromeExtraCommandLineArgs - string

    Specify additional command line arguments to add to the chromium executable when it is run.

    f.cookieSpec - string

    Default: browser-compatibility

    Allowed values: browser-compatibilityrfc-2965best-matchignore-all

    f.crawlJS - boolean

    Evaluate JavaScript on web pages when crawling. This makes it possible for the Web fetcher to extract content from pages that is only available after JavaScript has prepared the document, but it may make the crawl slower because JavaScript loading can be time consuming.

    Default: false

    f.credentialsFile - string

    Name of the file that contains the credentials for sites that require authentication to access. This file must be located in '$FUSION_HOME/data/connectors/container/lucid.web/<datasourceID>'.

    f.defaultCharSet - string

    Default character set to use when one is not declared in the HTTP headers.

    Default: UTF-8

    f.defaultMIMEType - string

    Default MIME type to use when one is not declared in the HTTP headers.

    Default: application/octet-stream

    f.deviceScreenFactor - integer

    Set an optional browser device screen factor. If not specified, will default to 1 (no scaling).

    >= 1

    <= 99999

    exclusiveMinimum: false

    exclusiveMaximum: false

    f.digestAuth - array[object]

    Settings for Digest authentication

    object attributes:{host required : {
     display name: Host
     type: string
    }
    id : {
     display name: Auth Config id
     type: string
    }
    password : {
     display name: Password
     type: string
    }
    port required : {
     display name: Port
     type: integer
    }
    realm : {
     display name: Realm
     type: string
    }
    userName : {
     display name: User
     type: string
    }
    }

    f.discardLinkURLAnchors - boolean

    If true, anchors found in URLs will be removed before being added to the discovery queue.

    Default: true

    f.discardLinkURLQueries - boolean

    If true, query parameters found in URLs will be removed before being added to the discovery queue.

    Default: false

    f.excludeSelectors - array[string]

    Jsoup-formatted selectors for elements to exclude from the crawled content. Syntax for jsoup selectors is available at http://jsoup.org/apidocs/org/jsoup/select/Selector.html.

    f.excludeTagClasses - array[string]

    HTML tag classes of elements to exclude from the crawled content.

    f.excludeTagIDs - array[string]

    HTML tag IDs of elements to exclude from the crawled content.

    f.excludeTags - array[string]

    HTML tag names of elements to exclude from the crawled content.

    f.extraLoadTimeMs - integer

    The JavaScript evaluation process will first wait for the DOM 'document.readyState' to be set to 'complete'; then it will wait until there are no more pending Ajax before emitting the page’s contents. Use this property to wait an additional number of milliseconds before emitting the contents. This gives background JavaScript routines a chance to finish rendering the page before the contents is emitted.

    >= -1

    <= 2147483647

    exclusiveMinimum: false

    exclusiveMaximum: false

    Default: 250

    f.extraPageLoadDeltaChars - integer

    This parameter is used when the "Extra time to wait for content after page load (ms)" parameter is > 0. It will stop the additional wait time if it sees the web page's content grows by at least this many characters. If set to 0 (the default) any increase in character count indicates the page load is finished.

    <= 2147483647

    exclusiveMinimum: false

    exclusiveMaximum: false

    Default: 0

    f.filteringRootTags - array[string]

    Root HTML elements whose child elements will be used to extract content. By default 'body' and 'head' elements are already included.

    Default: "body""head"

    f.followCanonicalTags - boolean

    Deduplicate, by only indexing the document at the URL specified in the canonical tag. https://en.wikipedia.org/wiki/Canonical_link_element

    Default: false

    f.formAuth - array[object]

    Settings for Form based authentication

    object attributes:{action required : {
     display name: URL
     type: string
    }
    id : {
     display name: Auth Config id
     type: string
    }
    params : {
     display name: Parameters
     type: object
    }
    password : {
     display name: Password
     type: string
    }
    passwordParamName : {
     display name: Password Parameter
     type: string
    }
    ttl : {
     display name: TTL (ms)
     type: number
    }
    }

    f.headlessBrowser - boolean

    Applicable only when "Evaluate JavaScript" and "High Performance Mode" are both selected, deselect this checkbox if you want to actually see browser windows display while fetchers process web pages. Otherwise, if selected, browsers will run in "headless" mode which means they will run in the background. If running on a server with no desktop interface, this must stay selected.

    Default: true

    f.includeSelectors - array[string]

    Jsoup-formatted selectors for elements to include in the crawled content.

    f.includeTagClasses - array[string]

    HTML tag classes of elements to include in the crawled content.

    f.includeTagIDs - array[string]

    HTML tag IDs of elements to include in the crawled content.

    f.includeTags - array[string]

    HTML tag names of elements to include in the crawled content.

    f.index_items_discarded - boolean

    Enable to index discarded document metadata

    Default: false

    f.jsAjaxTimeout - integer

    The time in milliseconds after which an AJAX request will be ignored when considering whether all AJAX requests have completed. Maximum: 180,000ms i.e. 3 minutes

    >= -1

    <= 180000

    exclusiveMinimum: false

    exclusiveMaximum: false

    Default: 20000

    f.jsEnabledAuth - boolean

    Evaluate JavaScript when doing SAML/SmartForm authentication. This is only applicable if you have specified a SmartForms/SAML Authentication element in the "Crawl Authentication" area.

    Default: false

    f.jsPageLoadTimeout - integer

    The time to wait in milliseconds for a page load to complete. If the timeout is -1, page loads can be indefinite. Maximum: 180,000ms i.e. 3 minutes

    >= -1

    <= 180000

    exclusiveMinimum: false

    exclusiveMaximum: false

    Default: 20000

    f.jsScriptTimeout - integer

    The time to wait in milliseconds wait for an asynchronous script to finish execution. If the timeout is -1, then the script will be allowed to run indefinitely. Maximum: 30,000ms

    >= -1

    <= 180000

    exclusiveMinimum: false

    exclusiveMaximum: false

    Default: 20000

    f.kerberosEnabled - boolean

    This tells the web connector to enable Spnego/Kerberos authentication scheme.

    f.kerberosKeytabBase64 - string

    This value is set as the base64 string of the to a keytab file of your principal that is used to authenticate. Optionally you can supply the keytab file path in the "Kerberos Keytab File Path" property, or the "Kerberos Password".

    f.kerberosKeytabFile - string

    This value is set as the file path on the server to a keytab file of the principal that is used to authenticate. Optionally you can supply the keytab as a base64 encoded string in the "Kerberos Keytab in Base64" property, or the "Kerberos Password".

    f.kerberosLoginContextName - string

    If you are using a login configuration file with the JVM property "java.security.auth.login.config" then this value will tell what login context name to choose from this file when authenticating with Kerberos.

    f.kerberosPassword - string

    The password of the principal to use when authenticating with kerberos. You can also specify a keytab in the "Kerberos Keytab File Path" or "Kerberos Keytab in Base64" properties.

    f.kerberosPrincipal - string

    When this value is specified along with a keytab, this value is the "Kerberos Principal" of the login user that has authorization to crawl your web site(s). If you do not specify this when kerberos/spnego is enabled, the default principal name will be used.

    f.kerberosSpn - string

    If you specify this value, this service principal name (SPN) will be used. If not specified, the resource you are accessing will be used to create this value from the client. An example of an SPN would be: "http@your.realm.com"

    f.maintainCookies - boolean

    If you are not using authentication, then by default cookies are not stored in between web requests (stateless). If checked, cookies will be maintained between requests during the web crawl even when you are not using authentication. If you are using authentication, this checkbox has no effect on the crawl and can be ignored.

    Default: false

    f.maxSizeBytes - integer

    Maximum size, in bytes, of a document to fetch.

    Default: 4194304

    f.mobileScreenHeight - integer

    If simulate mobile is checked, this specifies the device's emulated screen height.

    >= 1

    <= 9999999

    exclusiveMinimum: false

    exclusiveMaximum: false

    f.mobileScreenWidth - integer

    If simulate mobile is checked, this specifies the device's emulated screen width.

    >= 1

    <= 9999999

    exclusiveMinimum: false

    exclusiveMaximum: false

    f.ntlmAuth - array[object]

    Settings for NTLM authentication

    object attributes:{domain : {
     display name: Domain
     type: string
    }
    host required : {
     display name: Host
     type: string
    }
    id : {
     display name: Auth Config id
     type: string
    }
    password : {
     display name: Password
     type: string
    }
    port required : {
     display name: Port
     type: integer
    }
    realm : {
     display name: Realm
     type: string
    }
    userName : {
     display name: User
     type: string
    }
    workstation : {
     display name: Workstation
     type: string
    }
    }

    f.obeyCharSet - boolean

    Use the encoding sent by the web server (if any) when parsing content. If unset, Fusion will try to guess the character set when parsing.

    Default: true

    f.obeyLinkNofollow - boolean

    If true, rel='nofollow' on links are obeyed

    Default: true

    f.obeyRobots - boolean

    If true, Allow, Disallow and other rules found in a robots.txt file will be obeyed.

    Default: true

    f.obeyRobotsDelay - boolean

    If true, Crawl-Delay rules in robots.txt will be obeyed. Disabling this option will speed up crawling, but is considered negative behavior for sites you do not control.

    Default: true

    f.obeyRobotsMeta - boolean

    If true, rules like 'noindex', 'nofollow' and others found in a robots meta tag on a page or in the headers of the HTTP response are obeyed.

    Default: true

    f.proxy - string

    Address of the HTTP proxy, if required. This should be entered in the format host:port.

    f.quitTimeoutMs - integer

    The amount of time to wait for a web browser to quit before killing the browser process.

    >= -1

    <= 9999999

    exclusiveMinimum: false

    exclusiveMaximum: false

    Default: 5000

    f.requestCounterMaxWaitMs - integer

    The request counter plugin counts active ajax requests after a page was loaded until there are no more pending ajax requests. This parameter says how long to wait in milliseconds for the requestcount to go to 0 before giving up.

    >= 1

    <= 99999999

    exclusiveMinimum: false

    exclusiveMaximum: false

    Default: 20000

    f.requestCounterMinWaitMs - integer

    When the requestcounter is enabled, often early on the requestcount may say there are 0 pending requests... but there may still be ajax requests that haven't run yet. This parameter provides a certain time in milliseconds to wait for a non-zero count to be returned. If a requestcount is non-zero at any point, then the next requestcount = 0 is assumed to signify this page is done loading.

    <= 99999999

    exclusiveMinimum: false

    exclusiveMaximum: false

    Default: 5000

    f.requestRetryCount - integer

    If an http request fails, retry up to this many times before giving up. If set to 0, requests will not be retried. This is useful in situations where your crawls are failing with errors like "The target server failed to respond".

    Default: 0

    f.respectMetaEquivRedirects - boolean

    If true, the connector will follow metatags with refresh redirects.

    Default: false

    f.samlAuth - array[object]

    Settings for SAML/Smart Form based authentication allows you to visit one or more web pages that contain form inputs such as username, password, security questions, etc., submitting each one in turn in order to become authenticated.

    object attributes:{action required : {
     display name: URL
     type: string
    }
    id : {
     display name: Auth Config id
     type: string
    }
    params : {
     display name: Parameters
     type: object
    }
    password : {
     display name: Password
     type: string
    }
    passwordParamName : {
     display name: Password Parameter
     type: string
    }
    ttl : {
     display name: TTL (ms)
     type: number
    }
    }

    f.scrapeLinksBeforeFiltering - boolean

    If true, links will be extracted from documents before any other document processing has occurred. By default, links are extracted after all other document processing.

    Default: false

    f.screenshotFullscreen - boolean

    When taking a screenshot, capture the full screen.

    Default: false

    f.selectorFields - array[string]

    List of Jsoup selectors for elements to put into their separate field in the index. The field will have the same name as the element. Syntax for jsoup selectors is available at http://jsoup.org/apidocs/org/jsoup/select/Selector.html.

    f.simulateMobile - boolean

    Simulate a mobile device

    Default: false

    f.sitemapURLs - array[string]

    URLs for sitemaps, to be used a basis for link discovery. Rules found in sitemaps will not be processed.

    f.tagClassFields - array[string]

    HTML tag classes of elements to put into their own field in the index. The field will have the same name as the tag class.

    f.tagFields - array[string]

    HTML tags of elements to put into their own field in the index. The field will have the same name as the tag.

    f.tagIDFields - array[string]

    HTML tag IDs of elements to put into their own field in the index. The field will have the same name as the tag ID.

    f.takeScreenshot - boolean

    Applicable only when "Evaluate JavaScript" and "High Performance" are both selected, take a screenshot of the fully rendered page and index it. Screenshots will be indexed in a field called "screenshot_bin". You must make sure your schema specifies this fieldas a binary field or indexing will fail. To add this, go to System -> Solr Config -> Managed Schema then add <dynamicField indexed="true" name="*_bin" stored="true" type="binary"/>

    Default: false

    f.timeoutMS - integer

    Time in milliseconds to wait for server response.

    Default: 10000

    f.useHighPerfJsEval - boolean

    If you select this, JavaScript will be evaluated using a high performance browser. This step requires that you run a prerequisite installation script "$FusionInstallHome/bin/install-high-perf-web-deps.sh" (or "$FusionInstallHome/bin/install-high-perf-web-deps.sh" for Windows). This must be run on all Fusion nodes and will requires root/sudo/admin privileges.

    Default: false

    f.useIpAddressForSslConnections - boolean

    Use IP address instead of host name for SSLconnections. This is used to work around misconfigured HTTP server throwing 'unrecognized name' error whenSNI is enabled. (This only works if 'Allow all certificates' setting is also enabled)

    Default: false

    f.useRequestCounter - boolean

    Use the request counter plugin to wait for all pending ajax requests to be complete before loading the page contents.

    Default: true

    f.userAgentEmail - string

    Email address to use as part of connector identification.

    f.userAgentName - string

    Name the connector should use when identifying itself to a website in order to crawl it.

    Default: Lucidworks-Anda/2.0

    f.userAgentWebAddr - string

    Web address to use as part of connector identification.

    f.viewportHeight - integer

    Set an optional browser viewport height. If not specified, will default to 600.

    >= 1

    <= 9999999

    exclusiveMinimum: false

    exclusiveMaximum: false

    f.viewportWidth - integer

    Set an optional browser viewport width. If not specified, will default to 800.

    >= 1

    <= 9999999

    exclusiveMinimum: false

    exclusiveMaximum: false

    failFastOnStartLinkFailure - boolean

    If true, when Fusion cannot connect to any of the provided start links, the crawl is stopped and an exception logged.

    Default: true

    fetchDelayMS - integer

    Number of milliseconds to wait between fetch requests. The default is 0. This property can be used to throttle a crawl if necessary.

    Default: 0

    fetchDelayMSPerHost - boolean

    If true, the 'Fetch delay (ms)' property will be applied for each host.

    Default: true

    fetchThreads - integer

    The number of threads to use during fetching. The default is 5.

    Default: 5

    forceRefresh - boolean

    Set to true to recrawl all items even if they have not changed since the last crawl.

    Default: false

    includeExtensions - array[string]

    File extensions to be fetched. This will limit this datasource to only these file extensions.

    includeRegexes - array[string]

    Regular expressions for URI patterns to include. This will limit this datasource to only URIs that match the regular expression.

    indexCrawlDBToSolr - boolean

    EXPERIMENTAL: Set to true to index the crawl-database into a 'crawldb_<datasource-ID>' collection in Solr.

    Default: false

    initial_mapping - Initial field mapping

    Provides mapping of fields before documents are sent to an index pipeline.

    condition - string

    Define a conditional script that must result in true or false. This can be used to determine if the stage should process or not.

    label - string

    A unique label for this stage.

    <= 255 characters

    mappings - array[object]

    List of mapping rules

    Default: {"operation":"move","source":"charSet","target":"charSet_s"}{"operation":"move","source":"fetchedDate","target":"fetchedDate_dt"}{"operation":"move","source":"lastModified","target":"lastModified_dt"}{"operation":"move","source":"signature","target":"dedupeSignature_s"}{"operation":"move","source":"contentSignature","target":"signature_s"}{"operation":"move","source":"length","target":"length_l"}{"operation":"move","source":"mimeType","target":"mimeType_s"}{"operation":"move","source":"parent","target":"parent_s"}{"operation":"move","source":"owner","target":"owner_s"}{"operation":"move","source":"group","target":"group_s"}

    object attributes:{operation : {
     display name: Operation
     type: string
    }
    source required : {
     display name: Source Field
     type: string
    }
    target : {
     display name: Target Field
     type: string
    }
    }

    reservedFieldsMappingAllowed - boolean

    Default: false

    skip - boolean

    Set to true to skip this stage.

    Default: false

    unmapped - Unmapped Fields

    If fields do not match any of the field mapping rules, these rules will apply.

    operation - string

    The type of mapping to perform: move, copy, delete, add, set, or keep.

    Default: copy

    Allowed values: copymovedeletesetaddkeep

    source - string

    The name of the field to be mapped.

    target - string

    The name of the field to be mapped to.

    maxItems - integer

    Maximum number of documents to fetch. The default (-1) means no limit.

    Default: -1

    parserRetryCount - integer

    The maximum number of times the configured parser will try getting content before giving up

    <= 5

    exclusiveMinimum: false

    exclusiveMaximum: true

    Default: 0

    refreshAll - boolean

    Set to true to always recrawl all items found in the crawldb.

    Default: true

    refreshErrors - boolean

    Set to true to recrawl items that failed during the last crawl.

    Default: false

    refreshIDPrefixes - array[string]

    A prefix to recrawl all items whose IDs begin with this value.

    refreshIDRegexes - array[string]

    A regular expression to recrawl all items whose IDs match this pattern.

    refreshOlderThan - integer

    Number of seconds to recrawl items whose last fetched date is longer ago than this value.

    Default: -1

    refreshScript - string

    A JavaScript function ('shouldRefresh()') to customize the items recrawled.

    refreshStartLinks - boolean

    Set to true to recrawl items specified in the list of start links.

    Default: false

    restrictToTree - boolean

    If true, only URLs that match the startLinks URL domain will be followed

    Default: true

    restrictToTreeAllowSubdomains - boolean

    If true, any sub-domain will be allowed, even if the crawl is restricted to the tree of items found below the start links.

    Default: false

    restrictToTreeIgnoredHostPrefixes - array[string]

    List of host prefixes to ignore when checking links for restrictToTree link-legality checks. For example, 'www.' can be ignored so links with the same domain are allowed.

    Default: "www."

    restrictToTreeUseHostAndPath - boolean

    If true, the path in start links will be used to restrict items fetched. For example, if the start link is 'http://host.com/US', this option will limit all followed URLs to this path.

    Default: false

    retainOutlinks - boolean

    Set to true for links found during fetching to be stored in the crawldb. This increases precision in certain recrawl scenarios, but requires more memory and disk space.

    Default: false

    retryEmit - boolean

    Set to true for emit batch failures to be retried on a document-by-document basis.

    Default: true

    rewriteLinkScript - string

    A Javascript function 'rewriteLink(link) { }' to modify links to documents before they are fetched.

    sitemap_incremental_crawling - boolean

    When enabled, only URLs found in the sitemap will be processed and crawled.

    Default: false

    startLinks - array[string]

    One or more starting URIs for this datasource.

    trackEmbeddedIDs - boolean

    Track IDs produced by splitters to enable dedupe and deletion of embedded content?

    Default: true