Apache Solr Reference Guide Covering Apache Solr 6.0

ext_dfr , as well as any fields using a type that does not explicitly specify a .
If SchemaSimilarityFactory is explicitly declared with out configuring a defaultSimFromFieldType,
then BM25Similarity is implicitly used as the default.
In addition to the various factories mentioned on this page, there are several other similarity implementations that
can be used such as the SweetSpotSimilarityFactory, ClassicSimilarityFactory, etc.... For details,
see the Solr Javadocs for the similarity factories.
Schema API
The Schema API provides read and write access to the Solr schema for each collection (or core, when using
standalone Solr). Read access to all schema elements is supported. Fields, dynamic fields, field types and
copyField rules may be added, removed or replaced. Future Solr releases will extend write access to allow more
schema elements to be modified.
Re-index after schema modifications!
If you modify your schema, you will likely need to re-index all documents. If you do not, you may lose
access to documents, or not be able to interpret them properly, e.g. after replacing a field type.
Modifying your schema will never modify any documents that are already indexed. Again, you must
re-index documents in order to apply schema changes to them.
To enable schema modification with this API, the schema will need to be managed and mutable. See the section
Schema Factory Definition in SolrConfig for more information.
The API allows two output modes for all calls: JSON or XML. When requesting the complete schema, there is
another output mode which is XML modeled after the schema.xml file itself.
When modifying the schema with the API, a core reload will automatically occur in order for the changes to be
available immediately for documents indexed thereafter. Previously indexed documents will not be automatically
handled - they must be re-indexed if they used schema elements that you changed.
The base address for the API is http://:/solr/ . If for example you
run Solr's " cloud" example (via the bin/solr command shown below), which creates a " gettingstarted"
collection, then the base URL (as in all the sample URLs in this section) would be: http://localhost:8983/
solr/gettingstarted .
bin/solr -e cloud -noprompt
API Entry Points
Modify the Schema
Add a New Field
Delete a Field
Replace a Field
Add a Dynamic Field Rule
Delete a Dynamic Field Rule
Replace a Dynamic Field Rule
Add a New Field Type
Delete a Field Type
Replace a Field Type
Add a New Copy Field Rule
Delete a Copy Field Rule
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