1Attean::API::Binding(3)User Contributed Perl DocumentatioAnttean::API::Binding(3)
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6 Attean::API::Binding - Name to term bindings
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9 This document describes Attean::API::Binding version 0.022
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12 The Attean::API::Binding role defines a common API for all objects that
13 map names to Attean::API::Term objects. This includes triples, quads,
14 and SPARQL results (variable bindings).
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17 Classes consuming this role must provide the following methods:
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19 "value( $name )"
20 Returns the Attean::API::Term object mapped to the variable named
21 $name, or "undef" if no such term is mapped.
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23 "variables"
24 Returns a list of the variable names mapped to Attean::API::Term
25 objects in this mapping.
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27 "apply_map( $mapper )"
28 Returns a new mapping object (of the same class as the referent)
29 with term objects rewritten using the supplied Attean::Mapper
30 object $mapper.
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33 This role provides default implementations of the following methods:
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35 "mapping"
36 Returns a HASH mapping variable names to Attean::API::Term objects.
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38 "values"
39 Returns a list of Attean::API::Term objects corresponding to the
40 variable names returned by the referent's "variables" method.
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42 "tuples_string"
43 Returns a string serialization of the Attean::API::Term objects in
44 the order they are returned by the referent's "values" method.
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46 "as_string"
47 Returns a string serialization of the variable bindings.
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49 "has_blanks"
50 Returns true if any variable is bound to an Attean::API::Blank
51 term, false otherwise.
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53 "is_ground"
54 Returns tue is all the bound values consume Attean::API::Term,
55 false otherwise.
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57 "values_consuming_role( $role )"
58 Returns the list of bound values that consume $role.
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60 "tree_attributes"
61 Returns the variables which are bound in this object.
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63 "apply_bindings( $binding )"
64 Construct a new binding by replacing variables with their bound
65 values from $binding.
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67 "parse ( $string )"
68 Returns a triple or quad pattern object using the variables and/or
69 terms parsed from $string in SPARQL syntax.
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71 "project( @keys )"
72 Returns a new Attean::Result binding which contains variable-value
73 mappings from the invocant for every variable name in @keys.
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76 Please report any bugs or feature requests to through the GitHub web
77 interface at <https://github.com/kasei/attean/issues>.
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81 Gregory Todd Williams "<gwilliams@cpan.org>"
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84 Copyright (c) 2014--2019 Gregory Todd Williams. This program is free
85 software; you can redistribute it and/or modify it under the same terms
86 as Perl itself.
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90perl v5.28.1 2019-03-21 Attean::API::Binding(3)