* http://www.cs.unibo.it/helm/.
*)
-(******************************************************************************)
-(* *)
-(* PROJECT HELM *)
-(* *)
-(* Ferruccio Guidi <fguidi@cs.unibo.it> *)
-(* Domenico Lordi <lordi@cs.unibo.it> *)
-(* 30/04/2002 *)
-(* *)
-(* *)
-(******************************************************************************)
-
-exception MQInvalidURI of string
-exception MQConnectionFailed of string
-exception MQInvalidConnection of string
-
-(* Input types **************************************************************)
-(* main type is mquery *)
-
-type mqrvar = string (* name *)
-
-type mqsvar = string (* name *)
-
-type mqlvar = string (* name *)
-
-type mqpt = string option (* PROTOCOL TOKENS *)
- (* Some = constant string *)
- (* None = single star: '*' *)
-
-type mqbt = (* BODY TOKENS *)
- | MQBC of string (* a constant string *)
- | MQBD (* a slash: '/' *)
- | MQBQ (* a question mark: '?' *)
- | MQBS (* a single star: '*' *)
- | MQBSS (* a double star: '**' *)
-
-type mqft = (* FRAGMENT TOKENS *)
- | MQFC of int (* a constant integer *)
- | MQFS (* a single star: '*' *)
- | MQFSS (* a double star: '**' *)
-
-type mquref = UriManager.uri * (int list) (* uri, fragment identifier *)
-
-type mqtref = mqpt * (mqbt list) * (mqft list) (* tokenized pattern reference *)
-
-type mqref = string (* format for references (helper) *)
-
-type mqfunc =
- | MQName (* Name *)
- | MQTheory (* theory *)
- | MQTitle (* DC properties *)
- | MQContributor
- | MQCreator
- | MQPublisher
- | MQSubject
- | MQDescription
- | MQDate
- | MQType
- | MQFormat
- | MQIdentifier
- | MQLanguage
- | MQRelation
- | MQSource
- | MQCoverage
- | MQRights
- | MQInstitution
- | MQContact
- | MQFirstVersion
- | MQModified
-
-type mqstring =
- | MQCons of string (* constant *)
- | MQFunc of mqfunc * mqrvar (* function, rvar *)
- | MQStringRVar of mqrvar (* rvar *)
- | MQStringSVar of mqsvar (* svar *)
- | MQMConclusion (* main conclusion *)
- | MQConclusion (* inner conclusion *)
-
-type mqorder =
- | MQAsc (* ascending order *)
- | MQDesc (* descending order *)
-
-type mqbool =
- | MQTrue (* true *)
- | MQFalse (* false *)
- | MQAnd of mqbool * mqbool (* conjunction *)
- | MQOr of mqbool * mqbool (* disjunction *)
- | MQNot of mqbool (* negation *)
- | MQIs of mqstring * mqstring (* case-sensitive comparison *)
- | MQSetEqual of mqlist * mqlist (* the two lists denote the same set *)
- | MQSubset of mqlist * mqlist (* the two lists denote two sets, the 1st subset of the 2nd *)
-
-and mqlist =
- | MQReference of mqref list (* reference list *)
- | MQPattern of mqtref list (* pattern list *)
- | MQListLVar of mqlvar (* lvar *)
- | MQListRVar of mqrvar (* rvar *)
- | MQSelect of mqrvar * mqlist * mqbool (* rvar, list, boolean *)
- | MQUse of mqlist * mqsvar (* list, Position attribute *)
- | MQUsedBy of mqlist * mqsvar (* list, Position attribute *)
- | MQUnion of mqlist * mqlist (* operands *)
- | MQIntersect of mqlist * mqlist (* operands *)
- | MQSortedBy of mqlist * mqorder * mqfunc (* ordering *)
- | MQDiff of mqlist * mqlist (* set difference *)
- | MQLetIn of mqlvar * mqlist * mqlist (* explicit lvar assignment *)
- | MQMinimize of mqlist (* list minimization *)
-
-type mquery =
- | MQList of mqlist
-
-(* Output types *************************************************************)
-(* main type is mqresult *)
-
-type mqresult =
- | MQRefs of mqref list
+(* AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
+ *)
+
+(* output data structures ***************************************************)
+
+type path = string list (* the name of an attribute *)
+
+type value = string list (* the value of an attribute *)
+
+type attribute = path * value (* an attribute *)
+
+type attribute_group = attribute list (* a group of attributes *)
+
+type attribute_set = attribute_group list (* the attributes of an URI *)
+
+type resource = string * attribute_set (* an attributed URI *)
+
+type resource_set = resource list (* the query result *)
+
+type result = resource_set
+
+
+(* input data structures ****************************************************)
+
+type svar = string (* the name of a variable for a resource set *)
+
+type avar = string (* the name of a variable for a resource *)
+
+type vvar = string (* the name of a variable for an attribute value *)
+
+type inverse = bool
+
+type refine = RefineExact
+ | RefineSub
+ | RefineSuper
+
+type main = path
+
+type pattern = bool
+
+type exp = path * (path option)
+
+type exp_list = exp list
+
+type allbut = bool
+
+type xml = bool
+
+type source = bool
+
+type bin = BinFJoin (* full union - with attr handling *)
+ | BinFMeet (* full intersection - with attr handling *)
+ | BinFDiff (* full difference - with attr handling *)
+
+type gen = GenFJoin (* full union - with attr handling *)
+ | GenFMeet (* full intersection - with attr handling *)
+
+type test = Xor
+ | Or
+ | And
+ | Sub
+ | Meet
+ | Eq
+ | Le
+ | Lt
+
+type query = Empty
+ | SVar of svar
+ | AVar of avar
+ | Subj of msval
+ | Property of inverse * refine * path *
+ main * istrue * isfalse list * exp_list *
+ pattern * msval
+ | Select of avar * query * msval
+ | Bin of bin * query * query
+ | LetSVar of svar * query * query
+ | LetVVar of vvar * msval * query
+ | For of gen * avar * query * query
+ | Add of bool * groups * query
+ | If of msval * query * query
+ | Log of xml * source * query
+ | StatQuery of query
+ | Keep of allbut * path list * query
+
+and msval = False
+ | True
+ | Not of msval
+ | Ex of avar list * msval
+ | Test of test * msval * msval
+ | Const of string
+ | Set of msval list
+ | Proj of path option * query
+ | Dot of avar * path
+ | VVar of vvar
+ | StatVal of msval
+ | Count of msval
+ | Align of string * msval
+
+and groups = Attr of (path * msval) list list
+ | From of avar
+
+and con = pattern * path * msval
+
+and istrue = con list
+
+and isfalse = con list
projects / helm.git / blobdiff