Apache Solr Reference Guide Covering Apache Solr 6.0

InitParams
add-unknown-fields-to-the-schema
Alternately, one can achieve a similar effect using the "defaults" as shown in the example below:
defaults
add-unknown-fields-to-the-schema
Update Request Processor Factories
What follows are brief descriptions of the currently available update request processors.
UpdateRequestProcessorFactories can be integrated into an update chain in solrconfig.xml as necessary. You
are strongly urged to examine the Javadocs for these classes; these descriptions are abridged snippets taken for
the most part from the Javadocs.
AddSchemaFieldsUpdateProcessorFactory:
This processor will dynamically add fields to the schema if
an input document contains one or more fields that don't match any field or dynamic field in the schema.
CloneFieldUpdateProcessorFactory:
Clones the values found in any matching source field into the
configured dest field.
DefaultValueUpdateProcessorFactory:
A simple processor that adds a default value to any document
which does not already have a value in fieldName.
DocBasedVersionConstraintsProcessorFactory:
This Factory generates an UpdateProcessor that
helps to enforce version constraints on documents based on per-document version numbers using a
configured name of a versionField.
DocExpirationUpdateProcessorFactory:
Update Processor Factory for managing automatic
"expiration" of documents.
IgnoreCommitOptimizeUpdateProcessorFactory:
Allows you to ignore commit and/or optimize
requests from client applications when running in SolrCloud mode, for more information, see: Shards and
Indexing Data in SolrCloud
RegexpBoostProcessorFactory:
A processor which will match content of "inputField" against regular
expressions found in "boostFilename", and if it matches will return the corresponding boost value from the
file and output this to "boostField" as a double value.
SignatureUpdateProcessorFactory:
Uses a defined set of fields to generate a hash "signature" for
the document. Useful for only indexing one copy of "similar" documents.
StatelessScriptUpdateProcessorFactory:
An update request processor factory that enables the use of
update processors implemented as scripts.
TimestampUpdateProcessorFactory:
An update processor that adds a newly generated date value of
"NOW" to any document being added that does not already have a value in the specified field.
URLClassifyProcessorFactory:
Update processor which examines a URL and outputs to various other
fields with characteristics of that URL, including length, number of path levels, whether it is a top level
URL (levels==0), whether it looks like a landing/index page, a canonical representation of the URL (e.g.
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