Apache Solr Reference Guide Covering Apache Solr 6.0

used instead of the default.
First-Components and Last-Components
It's possible to define some components as being used before (with first-components) or after (with
omponents) the default components listed above.
last-c
first-components and/or last-components may only be used in conjunction with the default
components. If you define your own components, the default components will not be executed, and fir
st-components and last-components are disallowed.
mycomponent
spellcheck
Components
If you define components, the default components (see above) will not be executed, and first-components
and last-components are disallowed:
mycomponent
query
debug
Other Useful Components
Many of the other useful components are described in sections of this Guide for the features they support. These
are:
SpellCheckComponent, described in the section Spell Checking.
TermVectorComponent, described in the section The Term Vector Component.
QueryElevationComponent, described in the section The Query Elevation Component.
TermsComponent, described in the section The Terms Component.
InitParams in SolrConfig
An section of solrconfig.xml allows you to define request handler parameters outside of
the handler configuration.
The use cases are
Some handlers are implicitly defined in code and there should be a way to add/append/override some of
the implicitly defined properties
There are a few properties that are used across handlers . This helps you keep only a single definition of
those properties and apply them over multiple handlers
For example, if you want several of your search handlers to return the same list of fields, you can create an section without having to define the same set of parameters in each request handler definition. If you
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