Formal Shape Grammar

<shape-command>

SHAPE [<table-exp> [[AS] <alias>]][<shape-action>]

<table-exp>

{<provider-command-text>} |
(<shape-command>) |
TABLE <quoted-name> |
<quoted-name>

<shape-action>

APPEND <aliased-field-list> | 
COMPUTE <aliased-field-list> [BY <field-list>]

<aliased-field-list>

<aliased-field> [, <aliased-field...>]

<aliased-field>

<field-exp> [[AS] <alias>]

<field-exp>

(<relation-exp>) |
<calculated-exp> |
<aggregate-exp> |
<new-exp>

<relation_exp>

<table-exp> [[AS] <alias>] 
   RELATE <relation-cond-list>

<relation-cond-list>

<relation-cond> [, <relation-cond>...]

<relation-cond>

<field-name> TO <child-ref>

<child-ref>

<field-name> | 
PARAMETER <param-ref>

<param-ref>

<number>

<field-list>

<field-name> [, <field-name>]

<aggregate-exp>

SUM(<qualified-field-name>) |
AVG(<qualified-field-name>) |
MIN(<qualified-field-name>) |
MAX(<qualified-field-name>) |
COUNT(<qualified-alias> | <qualified-name>) |
STDEV(<qualified-field-name>) |
ANY(<qualified-field-name>) 

<calculated-exp>

CALC(<expression>)

<qualified-field-name>

<alias>.[<alias>...]<field-name>

<alias>

<quoted-name>

<field-name>

<quoted-name> [[AS] <alias>]

<quoted-name>

"<string>" |
'<string>' |
[<string>] |
<name>

<qualified-name>

alias[.alias...]

<name>

alpha [ alpha | digit | _ | # | : | ...]

<number>

digit [digit...]

<new-exp>

NEW <field-type> [(<number> [, <number>])]

<field-type>

<string>

unicode-char [unicode-char...]

<expression>