|<B>Simple Scalar typesB>||
Supported are strings, integers, real numbers and dates. More types
of this ilk are easily added.
string, int, real: see Tangram::Type::Scalar
|<B>Compound Structure typesB>||
perl_dump: see Tangram::Type::Dump::Perl. A perl_dump structure may
contain any structure which Data::Dumper can dump successfully.
yaml: see Tangram::Type::Dump::YAML. Very much like perl_dump, but implemented via the YAML serialisation engine. Doesnt currently work, due to inadequacies in the current Perl YAML implementation.
idbif: see Tangram::Type::Dump::Any. Like the above, but can combine multiple object properties into a single database column.
|<B>Flat Array & Hash typesB>||
Note: these are only actually required if you need to be able to query
on individual fields inside the array/hash - otherwise, the
perl_dump or idbif mapping is a lot faster and more flexible.
flat_array: see Array/Scalar in Tangram::Type
flat_hash: see Hash/Scalar in Tangram::Type
|<B>References to other objectsB>||ref: see Tangram::Type::Ref::FromMany (implementing an <B>N to 1B> relationship, in which any object can be the referant)|
|<B>Sets of other objectsB>||
Set relationships are closest to the main type of relationship used in
an RDBMS. Avid CompSci students will know that the relational
database model is based heavily on Set Theory, which is a subset of
a more general concept of Categories - generic couplings of a number
In Perl space, these collections are represented via the Set::Object module. Sets may not have duplicate elements, and cannot contain undef values.
|<B>Arrays of other objectsB>||The addition to Sets, you can have Arrays of objects, represented by a standard Perl array in memory. Arrays may contain undef values (in the middle of the list), and the array type may contain duplicates (ie, the same element present in seperate places in the list).|
|<B>Hashes of other objectsB>||Much like the Array types, the Hash types are indexed via a string value, and represented as a Perl hash in memory. These hashes may not contain undef values (those are dropped). The hash type may contain duplicate elements.|
|perl v5.20.3||TANGRAM::TYPE (3)||2015-10-09|