# Constant Field Values

## Contents

- org.apache.*

## org.apache.*

- org.apache.nutch.collection.CollectionManager
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DEFAULT_FILE_NAME` | `"subcollections.xml"`

- org.apache.nutch.collection.Subcollection
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `TAG_BLACKLIST` | `"blacklist"`
  `public static final String` | `TAG_COLLECTION` | `"subcollection"`
  `public static final String` | `TAG_COLLECTIONS` | `"subcollections"`
  `public static final String` | `TAG_ID` | `"id"`
  `public static final String` | `TAG_KEY` | `"key"`
  `public static final String` | `TAG_NAME` | `"name"`
  `public static final String` | `TAG_WHITELIST` | `"whitelist"`

- org.apache.nutch.crawl.CrawlDatum
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `FETCH_DIR_NAME` | `"crawl_fetch"`
  `public static final String` | `GENERATE_DIR_NAME` | `"crawl_generate"`
  `public static final String` | `PARSE_DIR_NAME` | `"crawl_parse"`
  `public static final byte` | `STATUS_DB_DUPLICATE` | `7`
  `public static final byte` | `STATUS_DB_FETCHED` | `2`
  `public static final byte` | `STATUS_DB_GONE` | `3`
  `public static final byte` | `STATUS_DB_MAX` | `31`
  `public static final byte` | `STATUS_DB_NOTMODIFIED` | `6`
  `public static final byte` | `STATUS_DB_ORPHAN` | `8`
  `public static final byte` | `STATUS_DB_REDIR_PERM` | `5`
  `public static final byte` | `STATUS_DB_REDIR_TEMP` | `4`
  `public static final byte` | `STATUS_DB_UNFETCHED` | `1`
  `public static final byte` | `STATUS_FETCH_GONE` | `37`
  `public static final byte` | `STATUS_FETCH_MAX` | `63`
  `public static final byte` | `STATUS_FETCH_NOTMODIFIED` | `38`
  `public static final byte` | `STATUS_FETCH_REDIR_PERM` | `36`
  `public static final byte` | `STATUS_FETCH_REDIR_TEMP` | `35`
  `public static final byte` | `STATUS_FETCH_RETRY` | `34`
  `public static final byte` | `STATUS_FETCH_SUCCESS` | `33`
  `public static final byte` | `STATUS_INJECTED` | `66`
  `public static final byte` | `STATUS_LINKED` | `67`
  `public static final byte` | `STATUS_PARSE_META` | `68`
  `public static final byte` | `STATUS_SIGNATURE` | `65`

- org.apache.nutch.crawl.CrawlDb
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `CRAWLDB_ADDITIONS_ALLOWED` | `"db.update.additions.allowed"`
  `public static final String` | `CRAWLDB_PURGE_404` | `"db.update.purge.404"`
  `public static final String` | `CRAWLDB_PURGE_ORPHANS` | `"db.update.purge.orphans"`
  `public static final String` | `CURRENT_NAME` | `"current"`
  `public static final String` | `LOCK_NAME` | `".locked"`

- org.apache.nutch.crawl.CrawlDbFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URL_FILTERING` | `"crawldb.url.filters"`
  `public static final String` | `URL_NORMALIZING` | `"crawldb.url.normalizers"`
  `public static final String` | `URL_NORMALIZING_SCOPE` | `"crawldb.url.normalizers.scope"`

- org.apache.nutch.crawl.DeduplicationJob
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `protected static final String` | `DEDUPLICATION_COMPARE_ORDER` | `"deduplication.compare.order"`
  `protected static final String` | `DEDUPLICATION_GROUP_MODE` | `"deduplication.group.mode"`

- org.apache.nutch.crawl.FetchSchedule
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final int` | `SECONDS_PER_DAY` | `86400`
  `public static final int` | `STATUS_MODIFIED` | `1`
  `public static final int` | `STATUS_NOTMODIFIED` | `2`
  `public static final int` | `STATUS_UNKNOWN` | `0`

- org.apache.nutch.crawl.Generator
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `GENERATE_UPDATE_CRAWLDB` | `"generate.update.crawldb"`
  `public static final String` | `GENERATOR_COUNT_MODE` | `"generate.count.mode"`
  `public static final String` | `GENERATOR_COUNT_VALUE_DOMAIN` | `"domain"`
  `public static final String` | `GENERATOR_COUNT_VALUE_HOST` | `"host"`
  `public static final String` | `GENERATOR_CUR_TIME` | `"generate.curTime"`
  `public static final String` | `GENERATOR_DELAY` | `"crawl.gen.delay"`
  `public static final String` | `GENERATOR_EXPR` | `"generate.expr"`
  `public static final String` | `GENERATOR_FETCH_DELAY_EXPR` | `"generate.fetch.delay.expr"`
  `public static final String` | `GENERATOR_FILTER` | `"generate.filter"`
  `public static final String` | `GENERATOR_HOSTDB` | `"generate.hostdb"`
  `public static final String` | `GENERATOR_MAX_COUNT` | `"generate.max.count"`
  `public static final String` | `GENERATOR_MAX_COUNT_EXPR` | `"generate.max.count.expr"`
  `public static final String` | `GENERATOR_MAX_NUM_SEGMENTS` | `"generate.max.num.segments"`
  `public static final String` | `GENERATOR_MIN_INTERVAL` | `"generate.min.interval"`
  `public static final String` | `GENERATOR_MIN_SCORE` | `"generate.min.score"`
  `public static final String` | `GENERATOR_NORMALISE` | `"generate.normalise"`
  `public static final String` | `GENERATOR_RESTRICT_STATUS` | `"generate.restrict.status"`
  `public static final String` | `GENERATOR_TOP_N` | `"generate.topN"`

- org.apache.nutch.crawl.Injector
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URL_FILTER_NORMALIZE_ALL` | `"crawldb.inject.filter.normalize.all"`

- org.apache.nutch.crawl.Injector.InjectMapper
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `EQUAL_CHARACTER` | `"="`
  `public static final String` | `TAB_CHARACTER` | `"\t"`
  `public static final String` | `URL_NORMALIZING_SCOPE` | `"crawldb.url.normalizers.scope"`

- org.apache.nutch.crawl.LinkDb
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `CURRENT_NAME` | `"current"`
  `public static final String` | `IGNORE_EXTERNAL_LINKS` | `"linkdb.ignore.external.links"`
  `public static final String` | `IGNORE_INTERNAL_LINKS` | `"linkdb.ignore.internal.links"`
  `public static final String` | `LOCK_NAME` | `".locked"`

- org.apache.nutch.crawl.LinkDbFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URL_FILTERING` | `"linkdb.url.filters"`
  `public static final String` | `URL_NORMALIZING` | `"linkdb.url.normalizer"`
  `public static final String` | `URL_NORMALIZING_SCOPE` | `"linkdb.url.normalizer.scope"`

- org.apache.nutch.crawl.MimeAdaptiveFetchSchedule
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `SCHEDULE_DEC_RATE` | `"db.fetch.schedule.adaptive.dec_rate"`
  `public static final String` | `SCHEDULE_INC_RATE` | `"db.fetch.schedule.adaptive.inc_rate"`
  `public static final String` | `SCHEDULE_MIME_FILE` | `"db.fetch.schedule.mime.file"`

- org.apache.nutch.crawl.URLPartitioner
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `PARTITION_MODE_DOMAIN` | `"byDomain"`
  `public static final String` | `PARTITION_MODE_HOST` | `"byHost"`
  `public static final String` | `PARTITION_MODE_IP` | `"byIP"`
  `public static final String` | `PARTITION_MODE_KEY` | `"partition.url.mode"`

- org.apache.nutch.fetcher.Fetcher
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `CONTENT_REDIR` | `"content"`
  `public static final int` | `PERM_REFRESH_TIME` | `5`
  `public static final String` | `PROTOCOL_REDIR` | `"protocol"`

- org.apache.nutch.fetcher.FetchItemQueues
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DEFAULT_ID` | `"default"`
  `public static final String` | `QUEUE_MODE_DOMAIN` | `"byDomain"`
  `public static final String` | `QUEUE_MODE_HOST` | `"byHost"`
  `public static final String` | `QUEUE_MODE_IP` | `"byIP"`

- org.apache.nutch.hostdb.ReadHostDb
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `HOSTDB_DUMP_HEADER` | `"hostdb.dump.field.header"`
  `public static final String` | `HOSTDB_DUMP_HOMEPAGES` | `"hostdb.dump.homepages"`
  `public static final String` | `HOSTDB_DUMP_HOSTNAMES` | `"hostdb.dump.hostnames"`
  `public static final String` | `HOSTDB_FILTER_EXPRESSION` | `"hostdb.filter.expression"`

- org.apache.nutch.hostdb.UpdateHostDb
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `HOSTDB_CHECK_FAILED` | `"hostdb.check.failed"`
  `public static final String` | `HOSTDB_CHECK_KNOWN` | `"hostdb.check.known"`
  `public static final String` | `HOSTDB_CHECK_NEW` | `"hostdb.check.new"`
  `public static final String` | `HOSTDB_CRAWLDATUM_PROCESSORS` | `"hostdb.crawldatum.processors"`
  `public static final String` | `HOSTDB_FORCE_CHECK` | `"hostdb.force.check"`
  `public static final String` | `HOSTDB_NUM_RESOLVER_THREADS` | `"hostdb.num.resolvers.threads"`
  `public static final String` | `HOSTDB_NUMERIC_FIELDS` | `"hostdb.numeric.fields"`
  `public static final String` | `HOSTDB_PERCENTILES` | `"hostdb.percentiles"`
  `public static final String` | `HOSTDB_PURGE_FAILED_HOSTS_THRESHOLD` | `"hostdb.purge.failed.hosts.threshold"`
  `public static final String` | `HOSTDB_RECHECK_INTERVAL` | `"hostdb.recheck.interval"`
  `public static final String` | `HOSTDB_STRING_FIELDS` | `"hostdb.string.fields"`
  `public static final String` | `HOSTDB_URL_FILTERING` | `"hostdb.url.filter"`
  `public static final String` | `HOSTDB_URL_NORMALIZING` | `"hostdb.url.normalize"`
  `public static final String` | `LOCK_NAME` | `".locked"`

- org.apache.nutch.indexer.IndexerMapReduce
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `INDEXER_BINARY_AS_BASE64` | `"indexer.binary.base64"`
  `public static final String` | `INDEXER_DELETE` | `"indexer.delete"`
  `public static final String` | `INDEXER_DELETE_ROBOTS_NOINDEX` | `"indexer.delete.robots.noindex"`
  `public static final String` | `INDEXER_DELETE_SKIPPED` | `"indexer.delete.skipped.by.indexingfilter"`
  `public static final String` | `INDEXER_NO_COMMIT` | `"indexer.nocommit"`
  `public static final String` | `INDEXER_PARAMS` | `"indexer.additional.params"`
  `public static final String` | `INDEXER_SKIP_NOTMODIFIED` | `"indexer.skip.notmodified"`
  `public static final String` | `URL_FILTERING` | `"indexer.url.filters"`
  `public static final String` | `URL_NORMALIZING` | `"indexer.url.normalizers"`

- org.apache.nutch.indexer.IndexingFilters
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `INDEXINGFILTER_ORDER` | `"indexingfilter.order"`

- org.apache.nutch.indexer.NutchDocument
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final byte` | `VERSION` | `2`

- org.apache.nutch.indexer.NutchIndexAction
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final byte` | `ADD` | `0`
  `public static final byte` | `DELETE` | `1`
  `public static final byte` | `UPDATE` | `2`

- org.apache.nutch.indexer.feed.FeedIndexingFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `dateFormatStr` | `"yyyyMMddHHmm"`

- org.apache.nutch.indexer.filter.MimeTypeIndexingFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `MIMEFILTER_REGEX_FILE` | `"mimetype.filter.file"`

- org.apache.nutch.indexer.links.LinksIndexingFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `LINKS_INLINKS_HOST` | `"index.links.inlinks.host.ignore"`
  `public static final String` | `LINKS_ONLY_HOSTS` | `"index.links.hosts.only"`
  `public static final String` | `LINKS_OUTLINKS_HOST` | `"index.links.outlinks.host.ignore"`

- org.apache.nutch.indexwriter.cloudsearch.CloudSearchConstants
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `BATCH_DUMP` | `"batch.dump"`
  `public static final String` | `ENDPOINT` | `"endpoint"`
  `public static final String` | `MAX_DOCS_BATCH` | `"batch.maxSize"`
  `public static final String` | `REGION` | `"region"`

- org.apache.nutch.indexwriter.csv.CSVConstants
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `CSV_CHARSET` | `"charset"`
  `public static final String` | `CSV_ESCAPECHARACTER` | `"escapechar"`
  `public static final String` | `CSV_FIELD_SEPARATOR` | `"separator"`
  `public static final String` | `CSV_FIELDS` | `"fields"`
  `public static final String` | `CSV_MAXFIELDLENGTH` | `"maxfieldlength"`
  `public static final String` | `CSV_MAXFIELDVALUES` | `"maxfieldvalues"`
  `public static final String` | `CSV_OUTPATH` | `"outpath"`
  `public static final String` | `CSV_QUOTECHARACTER` | `"quotechar"`
  `public static final String` | `CSV_VALUESEPARATOR` | `"valuesep"`
  `public static final String` | `CSV_WITHHEADER` | `"header"`

- org.apache.nutch.indexwriter.dummy.DummyConstants
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DELETE` | `"delete"`
  `public static final String` | `PATH` | `"path"`

- org.apache.nutch.indexwriter.elastic.ElasticConstants
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `BULK_CLOSE_TIMEOUT` | `"bulk.close.timeout"`
  `public static final String` | `EXPONENTIAL_BACKOFF_MILLIS` | `"exponential.backoff.millis"`
  `public static final String` | `EXPONENTIAL_BACKOFF_RETRIES` | `"exponential.backoff.retries"`
  `public static final String` | `HOSTS` | `"host"`
  `public static final String` | `INDEX` | `"index"`
  `public static final String` | `MAX_BULK_DOCS` | `"max.bulk.docs"`
  `public static final String` | `MAX_BULK_LENGTH` | `"max.bulk.size"`
  `public static final String` | `OPTIONS` | `"options"`
  `public static final String` | `PASSWORD` | `"password"`
  `public static final String` | `PORT` | `"port"`
  `public static final String` | `SCHEME` | `"scheme"`
  `public static final String` | `USE_AUTH` | `"auth"`
  `public static final String` | `USER` | `"username"`

- org.apache.nutch.indexwriter.kafka.KafkaConstants
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `HOST` | `"host"`
  `public static final String` | `KEY_SERIALIZER` | `"key.serializer"`
  `public static final String` | `MAX_DOC_COUNT` | `"max.doc.count"`
  `public static final String` | `PORT` | `"port"`
  `public static final String` | `TOPIC` | `"topic"`
  `public static final String` | `VALUE_SERIALIZER` | `"value.serializer"`

- org.apache.nutch.indexwriter.opensearch1x.OpenSearch1xConstants
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `BULK_CLOSE_TIMEOUT` | `"bulk.close.timeout"`
  `public static final String` | `EXPONENTIAL_BACKOFF_MILLIS` | `"exponential.backoff.millis"`
  `public static final String` | `EXPONENTIAL_BACKOFF_RETRIES` | `"exponential.backoff.retries"`
  `public static final String` | `HOSTS` | `"host"`
  `public static final String` | `INDEX` | `"index"`
  `public static final String` | `KEY_STORE_PASSWORD` | `"key.store.password"`
  `public static final String` | `KEY_STORE_PATH` | `"key.store.path"`
  `public static final String` | `KEY_STORE_TYPE` | `"key.store.type"`
  `public static final String` | `MAX_BULK_DOCS` | `"max.bulk.docs"`
  `public static final String` | `MAX_BULK_LENGTH` | `"max.bulk.size"`
  `public static final String` | `OPTIONS` | `"options"`
  `public static final String` | `PASSWORD` | `"password"`
  `public static final String` | `PORT` | `"port"`
  `public static final String` | `SCHEME` | `"scheme"`
  `public static final String` | `TRUST_STORE_PASSWORD` | `"trust.store.password"`
  `public static final String` | `TRUST_STORE_PATH` | `"trust.store.path"`
  `public static final String` | `TRUST_STORE_TYPE` | `"trust.store.type"`
  `public static final String` | `USER` | `"username"`

- org.apache.nutch.indexwriter.solr.SolrConstants
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `AUTH_HEADER_NAME` | `"auth.header.name"`
  `public static final String` | `AUTH_HEADER_VALUE` | `"auth.header.value"`
  `public static final String` | `COLLECTION` | `"collection"`
  `public static final String` | `COMMIT_SIZE` | `"commitSize"`
  `public static final String` | `PASSWORD` | `"password"`
  `public static final String` | `SERVER_TYPE` | `"type"`
  `public static final String` | `SERVER_URLS` | `"url"`
  `public static final String` | `USE_AUTH` | `"auth"`
  `public static final String` | `USERNAME` | `"username"`
  `public static final String` | `WEIGHT_FIELD` | `"weight.field"`

- org.apache.nutch.metadata.CreativeCommons
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `LICENSE_LOCATION` | `"License-Location"`
  `public static final String` | `LICENSE_URL` | `"License-Url"`
  `public static final String` | `WORK_TYPE` | `"Work-Type"`

- org.apache.nutch.metadata.DublinCore
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `CONTRIBUTOR` | `"contributor"`
  `public static final String` | `COVERAGE` | `"coverage"`
  `public static final String` | `CREATOR` | `"creator"`
  `public static final String` | `DATE` | `"date"`
  `public static final String` | `DESCRIPTION` | `"description"`
  `public static final String` | `FORMAT` | `"format"`
  `public static final String` | `IDENTIFIER` | `"identifier"`
  `public static final String` | `LANGUAGE` | `"language"`
  `public static final String` | `MODIFIED` | `"modified"`
  `public static final String` | `PUBLISHER` | `"publisher"`
  `public static final String` | `RELATION` | `"relation"`
  `public static final String` | `RIGHTS` | `"rights"`
  `public static final String` | `SOURCE` | `"source"`
  `public static final String` | `SUBJECT` | `"subject"`
  `public static final String` | `TITLE` | `"title"`
  `public static final String` | `TYPE` | `"type"`

- org.apache.nutch.metadata.Feed
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `FEED` | `"feed"`
  `public static final String` | `FEED_AUTHOR` | `"author"`
  `public static final String` | `FEED_PUBLISHED` | `"published"`
  `public static final String` | `FEED_TAGS` | `"tag"`
  `public static final String` | `FEED_UPDATED` | `"updated"`

- org.apache.nutch.metadata.HttpHeaders
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `CLIENT_TRANSFER_ENCODING` | `"Client-Transfer-Encoding"`
  `public static final String` | `CONTENT_DISPOSITION` | `"Content-Disposition"`
  `public static final String` | `CONTENT_ENCODING` | `"Content-Encoding"`
  `public static final String` | `CONTENT_LANGUAGE` | `"Content-Language"`
  `public static final String` | `CONTENT_LENGTH` | `"Content-Length"`
  `public static final String` | `CONTENT_LOCATION` | `"Content-Location"`
  `public static final String` | `CONTENT_MD5` | `"Content-MD5"`
  `public static final String` | `CONTENT_TYPE` | `"Content-Type"`
  `public static final String` | `IF_MODIFIED_SINCE` | `"If-Modified-Since"`
  `public static final String` | `LAST_MODIFIED` | `"Last-Modified"`
  `public static final String` | `LOCATION` | `"Location"`
  `public static final String` | `TRANSFER_ENCODING` | `"Transfer-Encoding"`
  `public static final String` | `USER_AGENT` | `"User-Agent"`

- org.apache.nutch.metadata.Nutch
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `ARG_CRAWLDB` | `"crawldb"`
  `public static final String` | `ARG_HOSTDB` | `"hostdb"`
  `public static final String` | `ARG_LINKDB` | `"linkdb"`
  `public static final String` | `ARG_SEEDDIR` | `"url_dir"`
  `public static final String` | `ARG_SEEDNAME` | `"seedName"`
  `public static final String` | `ARG_SEGMENTDIR` | `"segment_dir"`
  `public static final String` | `ARG_SEGMENTS` | `"segment"`
  `public static final String` | `CACHING_FORBIDDEN_ALL` | `"all"`
  `public static final String` | `CACHING_FORBIDDEN_CONTENT` | `"content"`
  `public static final String` | `CACHING_FORBIDDEN_KEY` | `"caching.forbidden"`
  `public static final String` | `CACHING_FORBIDDEN_NONE` | `"none"`
  `public static final String` | `CHAR_ENCODING_FOR_CONVERSION` | `"CharEncodingForConversion"`
  `public static final String` | `CRAWL_ID_KEY` | `"storage.crawl.id"`
  `public static final String` | `FETCH_EVENT_CONTENTLANG` | `"content-language"`
  `public static final String` | `FETCH_EVENT_CONTENTTYPE` | `"content-type"`
  `public static final String` | `FETCH_EVENT_FETCHTIME` | `"fetchTime"`
  `public static final String` | `FETCH_EVENT_SCORE` | `"score"`
  `public static final String` | `FETCH_EVENT_TITLE` | `"title"`
  `public static final String` | `FETCH_STATUS_KEY` | `"_fst_"`
  `public static final String` | `FETCH_TIME_KEY` | `"_ftk_"`
  `public static final String` | `FIXED_INTERVAL_KEY` | `"fixedInterval"`
  `public static final String` | `GENERATE_TIME_KEY` | `"_ngt_"`
  `public static final String` | `ORIGINAL_CHAR_ENCODING` | `"OriginalCharEncoding"`
  `public static final String` | `PROTO_STATUS_KEY` | `"_pst_"`
  `public static final String` | `REPR_URL_KEY` | `"_repr_"`
  `public static final String` | `ROBOTS_METATAG` | `"robots"`
  `public static final String` | `SCORE_KEY` | `"nutch.crawl.score"`
  `public static final String` | `SEGMENT_NAME_KEY` | `"nutch.segment.name"`
  `public static final String` | `SIGNATURE_KEY` | `"nutch.content.digest"`
  `public static final String` | `STAT_PROGRESS` | `"progress"`
  `public static final String` | `VAL_RESULT` | `"result"`

- org.apache.nutch.microformats.reltag.RelTagParser
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `REL_TAG` | `"Rel-Tag"`

- org.apache.nutch.net.URLFilters
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URLFILTER_ORDER` | `"urlfilter.order"`

- org.apache.nutch.net.URLNormalizers
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `SCOPE_CRAWLDB` | `"crawldb"`
  `public static final String` | `SCOPE_DEFAULT` | `"default"`
  `public static final String` | `SCOPE_FETCHER` | `"fetcher"`
  `public static final String` | `SCOPE_GENERATE_HOST_COUNT` | `"generate_host_count"`
  `public static final String` | `SCOPE_INDEXER` | `"indexer"`
  `public static final String` | `SCOPE_INJECT` | `"inject"`
  `public static final String` | `SCOPE_LINKDB` | `"linkdb"`
  `public static final String` | `SCOPE_OUTLINK` | `"outlink"`
  `public static final String` | `SCOPE_PARTITION` | `"partition"`

- org.apache.nutch.net.protocols.ProtocolLogUtil
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `HTTP_LOG_SUPPRESSION` | `"http.log.exceptions.suppress.stack"`

- org.apache.nutch.net.protocols.Response
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `FETCH_TIME` | `"nutch.fetch.time"`
  `public static final String` | `IP_ADDRESS` | `"_ip_"`
  `public static final String` | `REQUEST` | `"_request_"`
  `public static final String` | `RESPONSE_HEADERS` | `"_response.headers_"`
  `public static final String` | `TRUNCATED_CONTENT` | `"http.content.truncated"`
  `public static final String` | `TRUNCATED_CONTENT_REASON` | `"http.content.truncated.reason"`

- org.apache.nutch.net.urlnormalizer.basic.BasicURLNormalizer
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `NORM_HOST_IDN` | `"urlnormalizer.basic.host.idn"`
  `public static final String` | `NORM_HOST_TRIM_TRAILING_DOT` | `"urlnormalizer.basic.host.trim-trailing-dot"`

- org.apache.nutch.parse.HtmlParseFilters
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `HTMLPARSEFILTER_ORDER` | `"htmlparsefilter.order"`

- org.apache.nutch.parse.ParseData
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DIR_NAME` | `"parse_data"`

- org.apache.nutch.parse.ParserFactory
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DEFAULT_PLUGIN` | `"*"`

- org.apache.nutch.parse.ParseSegment
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `SKIP_TRUNCATED` | `"parser.skip.truncated"`

- org.apache.nutch.parse.ParseStatus
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final byte` | `FAILED` | `2`
  `public static final short` | `FAILED_EXCEPTION` | `200`
  `public static final short` | `FAILED_INVALID_FORMAT` | `203`
  `public static final short` | `FAILED_MISSING_CONTENT` | `205`
  `public static final short` | `FAILED_MISSING_PARTS` | `204`
  `public static final short` | `FAILED_TRUNCATED` | `202`
  `public static final byte` | `NOTPARSED` | `0`
  `public static final byte` | `SUCCESS` | `1`
  `public static final short` | `SUCCESS_REDIRECT` | `100`

- org.apache.nutch.parse.ParseText
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DIR_NAME` | `"parse_text"`

- org.apache.nutch.parse.feed.FeedParser
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `CHARSET_UTF8` | `"charset=UTF-8"`
  `public static final String` | `TEXT_PLAIN_CONTENT_TYPE` | `"text/plain; charset=UTF-8"`

- org.apache.nutch.parsefilter.naivebayes.NaiveBayesParseFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DICTFILE_MODELFILTER` | `"parsefilter.naivebayes.wordlist"`
  `public static final String` | `TRAINFILE_MODELFILTER` | `"parsefilter.naivebayes.trainfile"`

- org.apache.nutch.protocol.Content
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DIR_NAME` | `"content"`

- org.apache.nutch.protocol.ProtocolStatus
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final int` | `ACCESS_DENIED` | `17`
  `public static final int` | `BLOCKED` | `23`
  `public static final int` | `EXCEPTION` | `16`
  `public static final int` | `FAILED` | `2`
  `public static final int` | `GONE` | `11`
  `public static final int` | `MOVED` | `12`
  `public static final int` | `NOTFETCHING` | `20`
  `public static final int` | `NOTFOUND` | `14`
  `public static final int` | `NOTMODIFIED` | `21`
  `public static final int` | `PROTO_NOT_FOUND` | `10`
  `public static final int` | `REDIR_EXCEEDED` | `19`
  `public static final int` | `RETRY` | `15`
  `public static final int` | `ROBOTS_DENIED` | `18`
  `public static final int` | `SUCCESS` | `1`
  `public static final int` | `TEMP_MOVED` | `13`
  `public static final int` | `WOULDBLOCK` | `22`

- org.apache.nutch.protocol.http.api.HttpBase
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final int` | `BUFFER_SIZE` | `8192`

- org.apache.nutch.protocol.httpclient.HttpAuthenticationFactory
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `WWW_AUTHENTICATE` | `"WWW-Authenticate"`

- org.apache.nutch.scoring.depth.DepthScoringFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final int` | `DEFAULT_MAX_DEPTH` | `1000`
  `public static final String` | `DEPTH_KEY` | `"_depth_"`
  `public static final String` | `MAX_DEPTH_KEY` | `"_maxdepth_"`

- org.apache.nutch.scoring.metadata.MetadataScoringFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `METADATA_CONTENT` | `"scoring.content.md"`
  `public static final String` | `METADATA_DATUM` | `"scoring.db.md"`
  `public static final String` | `METADATA_PARSED` | `"scoring.parse.md"`

- org.apache.nutch.scoring.webgraph.LinkDatum
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final byte` | `INLINK` | `1`
  `public static final byte` | `OUTLINK` | `2`

- org.apache.nutch.scoring.webgraph.LinkDumper
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DUMP_DIR` | `"linkdump"`

- org.apache.nutch.scoring.webgraph.WebGraph
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `INLINK_DIR` | `"inlinks"`
  `public static final String` | `LOCK_NAME` | `".locked"`
  `public static final String` | `NODE_DIR` | `"nodes"`
  `public static final String` | `OLD_OUTLINK_DIR` | `"outlinks/old"`
  `public static final String` | `OUTLINK_DIR` | `"outlinks/current"`

- org.apache.nutch.scoring.webgraph.WebGraph.OutlinkDb
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URL_FILTERING` | `"webgraph.url.filters"`
  `public static final String` | `URL_NORMALIZING` | `"webgraph.url.normalizers"`

- org.apache.nutch.service.resources.ConfigResource
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DEFAULT` | `"default"`

- org.apache.nutch.tools.CommonCrawlFormatWARC
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `MAX_WARC_FILE_SIZE` | `"warc.file.size.max"`
  `public static final String` | `TEMPLATE` | `"${prefix}-${timestamp17}-${serialno}"`

- org.apache.nutch.tools.WARCUtils
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `COLONSP` | `": "`
  `public static final String` | `CONFORMS_TO` | `"conformsTo"`
  `public static final String` | `CRLF` | `"\r\n"`
  `public static final String` | `FORMAT` | `"format"`
  `public static final String` | `HOSTNAME` | `"hostname"`
  `public static final String` | `HTTP_HEADER_FROM` | `"http-header-from"`
  `public static final String` | `HTTP_HEADER_USER_AGENT` | `"http-header-user-agent"`
  `public static final String` | `IP` | `"ip"`
  `public static final String` | `OPERATOR` | `"operator"`
  `public static final String` | `ROBOTS` | `"robots"`
  `public static final String` | `SOFTWARE` | `"software"`
  `protected static final String` | `X_HIDE_HEADER` | `"X-Crawler-"`

- org.apache.nutch.tools.arc.ArcSegmentCreator
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URL_VERSION` | `"arc.url.version"`

- org.apache.nutch.tools.arc.ArcSegmentCreator.ArcSegmentCreatorMapper
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URL_VERSION` | `"arc.url.version"`

- org.apache.nutch.urlfilter.automaton.AutomatonURLFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URLFILTER_AUTOMATON_FILE` | `"urlfilter.automaton.file"`
  `public static final String` | `URLFILTER_AUTOMATON_RULES` | `"urlfilter.automaton.rules"`

- org.apache.nutch.urlfilter.fast.FastURLFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URLFILTER_FAST_FILE` | `"urlfilter.fast.file"`
  `public static final String` | `URLFILTER_FAST_MAX_LENGTH` | `"urlfilter.fast.url.max.length"`
  `public static final String` | `URLFILTER_FAST_PATH_MAX_LENGTH` | `"urlfilter.fast.url.path.max.length"`
  `public static final String` | `URLFILTER_FAST_QUERY_MAX_LENGTH` | `"urlfilter.fast.url.query.max.length"`

- org.apache.nutch.urlfilter.ignoreexempt.ExemptionUrlFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `DB_IGNORE_EXTERNAL_EXEMPTIONS_FILE` | `"db.ignore.external.exemptions.file"`

- org.apache.nutch.urlfilter.regex.RegexURLFilter
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `URLFILTER_REGEX_FILE` | `"urlfilter.regex.file"`
  `public static final String` | `URLFILTER_REGEX_RULES` | `"urlfilter.regex.rules"`

- org.apache.nutch.util.EncodingDetector
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `MIN_CONFIDENCE_KEY` | `"encodingdetector.charset.min.confidence"`
  `public static final int` | `NO_THRESHOLD` | `-1`

- org.apache.nutch.util.NutchConfiguration
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `UUID_KEY` | `"nutch.conf.uuid"`

- org.apache.nutch.util.SitemapProcessor
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final String` | `CURRENT_NAME` | `"current"`
  `public static final String` | `LOCK_NAME` | `".locked"`
  `public static final String` | `SITEMAP_ALWAYS_TRY_SITEMAPXML_ON_ROOT` | `"sitemap.url.default.sitemap.xml"`
  `public static final String` | `SITEMAP_OVERWRITE_EXISTING` | `"sitemap.url.overwrite.existing"`
  `public static final String` | `SITEMAP_REDIR_MAX` | `"sitemap.redir.max"`
  `public static final String` | `SITEMAP_SIZE_MAX` | `"sitemap.size.max"`
  `public static final String` | `SITEMAP_STRICT_PARSING` | `"sitemap.strict.parsing"`
  `public static final String` | `SITEMAP_URL_FILTERING` | `"sitemap.url.filter"`
  `public static final String` | `SITEMAP_URL_NORMALIZING` | `"sitemap.url.normalize"`

- org.apache.nutch.util.domain.DomainSuffix
  Modifier and Type | Constant Field | Value
  --- | --- | ---
  `public static final float` | `DEFAULT_BOOST` | `1.0f`