documentation on the pragmatics behind the example schema.xml

[Giovanni Gherdovich]

Hi all,

in the example schema.xml I can find a wide variety
of fieldType and field, already there to be used.

I believe each of them has been designed for a specific
usage case, with some pragmatics in mind.

Where can I find documentation on what those field / fieldTypes
were designed for? Is the best place to get those info
the schema.xml file and its comments?

cheers,
GGhh

here I cut and paste fields and fieldTypes I have:

-- -- >8  -- -- >8  -- -- >8  -- -- >8  -- -- >8  -- -- >8
   <field name="id" type="string" indexed="true" stored="true"
required="true" />
   <field name="sku" type="textTight" indexed="true" stored="true"
omitNorms="true"/>
   <field name="name" type="textgen" indexed="true" stored="true"/>
   <field name="alphaNameSort" type="alphaOnlySort" indexed="true"
stored="false"/>
   <field name="manu" type="textgen" indexed="true" stored="true"
omitNorms="true"/>
   <field name="cat" type="text_ws" indexed="true" stored="true"
multiValued="true" omitNorms="true" />
   <field name="features" type="text" indexed="true" stored="true"
multiValued="true"/>
   <field name="includes" type="text" indexed="true" stored="true"
termVectors="true" termPositions="true" termOffsets="true" />
   <field name="weight" type="float" indexed="true" stored="true"/>
   <field name="price"  type="float" indexed="true" stored="true"/>
   <field name="popularity" type="int" indexed="true" stored="true" />
   <field name="inStock" type="boolean" indexed="true" stored="true" />
   <field name="title" type="text" indexed="true" stored="true"
multiValued="true"/>
   <field name="subject" type="text" indexed="true" stored="true"/>
   <field name="description" type="text" indexed="true" stored="true"/>
   <field name="comments" type="text" indexed="true" stored="true"/>
   <field name="author" type="textgen" indexed="true" stored="true"/>
   <field name="keywords" type="textgen" indexed="true" stored="true"/>
   <field name="category" type="textgen" indexed="true" stored="true"/>
   <field name="content_type" type="string" indexed="true"
stored="true" multiValued="true"/>
   <field name="last_modified" type="date" indexed="true" stored="true"/>
   <field name="links" type="string" indexed="true" stored="true"
multiValued="true"/>
   <field name="text" type="text" indexed="true" stored="false"
multiValued="true"/>
   <field name="text_rev" type="text_rev" indexed="true"
stored="false" multiValued="true"/>
   <field name="manu_exact" type="string" indexed="true" stored="false"/>
   <field name="payloads" type="payloads" indexed="true" stored="true"/>
   <field name="timestamp" type="date" indexed="true" stored="true"
default="NOW" multiValued="false"/>
-- -- >8  -- -- >8  -- -- >8  -- -- >8  -- -- >8  -- -- >8

-- -- >8  -- -- >8  -- -- >8  -- -- >8  -- -- >8  -- -- >8
    <fieldType name="string" class="solr.StrField"
sortMissingLast="true" omitNorms="true"/>
    <fieldType name="boolean" class="solr.BoolField"
sortMissingLast="true" omitNorms="true"/>
    <fieldType name="int" class="solr.TrieIntField" precisionStep="0"
omitNorms="true" positionIncrementGap="0"/>
    <fieldType name="float" class="solr.TrieFloatField"
precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
    <fieldType name="long" class="solr.TrieLongField"
precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
    <fieldType name="double" class="solr.TrieDoubleField"
precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
    <fieldType name="tint" class="solr.TrieIntField" precisionStep="8"
omitNorms="true" positionIncrementGap="0"/>
    <fieldType name="tfloat" class="solr.TrieFloatField"
precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
    <fieldType name="tlong" class="solr.TrieLongField"
precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
    <fieldType name="tdouble" class="solr.TrieDoubleField"
precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
    <fieldType name="date" class="solr.TrieDateField" omitNorms="true"
precisionStep="0" positionIncrementGap="0"/>
    <fieldType name="tdate" class="solr.TrieDateField"
omitNorms="true" precisionStep="6" positionIncrementGap="0"/>
    <fieldType name="pint" class="solr.IntField" omitNorms="true"/>
    <fieldType name="plong" class="solr.LongField" omitNorms="true"/>
    <fieldType name="pfloat" class="solr.FloatField" omitNorms="true"/>
    <fieldType name="pdouble" class="solr.DoubleField" omitNorms="true"/>
    <fieldType name="pdate" class="solr.DateField"
sortMissingLast="true" omitNorms="true"/>
    <fieldType name="sint" class="solr.SortableIntField"
sortMissingLast="true" omitNorms="true"/>
    <fieldType name="slong" class="solr.SortableLongField"
sortMissingLast="true" omitNorms="true"/>
    <fieldType name="sfloat" class="solr.SortableFloatField"
sortMissingLast="true" omitNorms="true"/>
    <fieldType name="sdouble" class="solr.SortableDoubleField"
sortMissingLast="true" omitNorms="true"/>
    <fieldType name="random" class="solr.RandomSortField" indexed="true" />
    <fieldType name="text_greek" class="solr.TextField">
    <fieldType name="text_ws" class="solr.TextField" positionIncrementGap="100">
    <fieldType name="text" class="solr.TextField" positionIncrementGap="100">
    <fieldType name="textTight" class="solr.TextField"
positionIncrementGap="100" >
    <fieldType name="textgen" class="solr.TextField" positionIncrementGap="100">
    <fieldType name="text_rev" class="solr.TextField"
positionIncrementGap="100">
    <fieldType name="textCharNorm" class="solr.TextField"
positionIncrementGap="100" >
    <fieldType name="alphaOnlySort" class="solr.TextField"
sortMissingLast="true" omitNorms="true">
    <fieldType name="lowercase" class="solr.TextField"
positionIncrementGap="100">
-- -- >8  -- -- >8  -- -- >8  -- -- >8  -- -- >8  -- -- >8