DIRECTORY
Rope USING [Equal, Find, InlineFetch, Length, ROPE],
PBasics USING [ByteBlt],
YggDID USING [DID, EqualDIDs, ValidateDID],
YggDIDMap USING [AddRootDID, CreateNewDID, DestroyDID, GetRootDIDs, RemoveRootDID],
YggDIDPrivate USING [DIDRep],
YggEnvironment USING [nullDID, nullTransID, Outcome, TransID],
YggFixedNames USING [],
YggIndex USING [],
YggIndexMaint USING [AddOrRemoveIndexPattern],
YggNav USING [ErrorDesc, LinkList],
YggRep USING [AccurateGMT, AccurateGMTRep, Attribute, AttributeValue, Bits, BitsRep, BytesFromBits, BytesToBits, date, did, DocType, float, int, lastReservedDocType, LatchVDoc, linkMod, metaAttributeMod, noValue, rope, shortRope, SetSizeOfBits, SizeOfBits, symbolicLink, TypedPrimitiveElement, UnlatchVDoc, uninterpretedBytes, VDoc, VolatizeFromDID],
YggTransaction USING [Check, CreateTrans, Finish, GetDefaultContainer, NotePossibleDocumentUpdate, SetDefaultContainer];

YggNavImpl: CEDAR MONITOR
IMPORTS PBasics, Rope, YggDID, YggDIDMap, YggIndexMaint, YggRep, YggTransaction
EXPORTS YggDID, YggFixedNames, YggNav
~ BEGIN

ROPE: TYPE = Rope.ROPE;

Error: PUBLIC ERROR [error: YggNav.ErrorDesc] = CODE;


DID: PUBLIC TYPE ~ REF DIDRep;
DIDRep: PUBLIC TYPE ~ YggDIDPrivate.DIDRep;

NoBytes: YggRep.Bits;

Contents: PUBLIC Rope.ROPE _ "$contents";
Inlinks: PUBLIC Rope.ROPE _ "$inlinks";
Outlinks: PUBLIC Rope.ROPE _ "$outlinks";
Parents: PUBLIC Rope.ROPE _ "$parents";
Children: PUBLIC Rope.ROPE _ "$children";
ParentContainers: PUBLIC Rope.ROPE _ "$parent-containers";
ChildContainers: PUBLIC Rope.ROPE _ "$child-containers";
AutoIndices: PUBLIC Rope.ROPE _ "$auto-indices";

IndexPrefix: PUBLIC Rope.ROPE _ "$index-";
IndexPrefixSize: PUBLIC INT _ Rope.Length[IndexPrefix];

DirectoryContents: PUBLIC Rope.ROPE _ "$directoryContents";
NFSPropertyName: PUBLIC Rope.ROPE _ "$NFSProperites"; -- NFS (UNIX) properties

StartTransaction: PUBLIC PROC [parentTrans: YggEnvironment.TransID] RETURNS [trans: YggEnvironment.TransID] ~ {
trans _ YggTransaction.CreateTrans[parentTrans];
};
EndTransaction: PUBLIC PROC [trans: YggEnvironment.TransID, commit: BOOL] RETURNS [ok: BOOL _ TRUE] ~ {
outcome: YggEnvironment.Outcome;
[outcome: outcome] _ YggTransaction.Finish[transID: trans, requestedOutcome: IF commit THEN commit ELSE abort];
IF outcome = commit THEN RETURN [TRUE] ELSE RETURN [FALSE];
};
CheckTransaction: PUBLIC PROC [trans: YggEnvironment.TransID] RETURNS [found: BOOL _ FALSE, active: BOOL _ FALSE, committed: BOOL _ FALSE] ~ {
outcome: YggEnvironment.Outcome;
[outcome: outcome] _ YggTransaction.Check[transID: trans];
SELECT outcome FROM
 active => RETURN [TRUE, TRUE, FALSE];
 abort => RETURN [TRUE, FALSE, FALSE];
 commit => RETURN [TRUE, FALSE, TRUE];
 unknown => RETURN [FALSE, FALSE, FALSE];
 suspended => RETURN [TRUE, FALSE, FALSE];
ENDCASE => ERROR;
};
GetRoots: PUBLIC PROC RETURNS [roots: LIST OF DID] ~ {
roots _ YggDIDMap.GetRootDIDs[];
};
AddRoot: PUBLIC PROC [did: DID] RETURNS [ok: BOOL _ FALSE] ~ {
IF ~YggDID.ValidateDID[did] THEN RETURN [FALSE];
ok _ YggDIDMap.AddRootDID[did];
};
RemoveRoot: PUBLIC PROC [did: DID] RETURNS [ok: BOOL _ TRUE] ~ {
IF ~YggDID.ValidateDID[did] THEN RETURN [FALSE];
ok _ YggDIDMap.RemoveRootDID[did];
};
GetTypeOfContents: PUBLIC PROC [trans: YggEnvironment.TransID, did: YggDID.DID] RETURNS [YggRep.DocType] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did];
RETURN[document.contents.docType];
};
IsDocTypeUninterpretedOK: PROC [docType: YggRep.DocType] RETURNS [ok: BOOL] ~ {
IF docType # YggRep.uninterpretedBytes AND docType # YggRep.symbolicLink AND docType <= YggRep.lastReservedDocType THEN RETURN [TRUE] ELSE RETURN [FALSE];
};

GetUninterpretedContents: PUBLIC UNSAFE PROC [trans: YggEnvironment.TransID, did: DID, firstByte: CARD, byteCount: CARD, to: LONG POINTER] RETURNS [bytesMoved: CARD] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did];
[] _ YggRep.LatchVDoc[document];
IF IsDocTypeUninterpretedOK[document.contents.docType] THEN {
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
ERROR Error[[$invalidReservedType, "Attempt to access a TypedPrimitiveElement with reserved type as uninterpreted"]];
};
YggRep.BytesFromBits[bits: document.contents.bits, startByte: firstByte, block: [base: LOOPHOLE[to], startIndex: 0, count: byteCount]];
bytesMoved _ byteCount;
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
GetContents: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID] RETURNS [contents: YggRep.TypedPrimitiveElement] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did];
[] _ YggRep.LatchVDoc[document];
contents _ document.contents;
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
SetUninterpretedContents: PUBLIC UNSAFE PROC [trans: YggEnvironment.TransID, did: YggDID.DID, setDocType: BOOL, docType: YggRep.DocType, firstByte: CARD, byteCount: CARD, from: LONG POINTER] RETURNS [bytesMoved: CARD] ~ {
document: YggRep.VDoc;
newRef: BOOL;
newBits: YggRep.Bits;
oldContentsBits: YggRep.Bits;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readWrite, [write, wait]];
[] _ YggRep.LatchVDoc[document];
IF setDocType THEN {
IF IsDocTypeUninterpretedOK[docType] THEN {
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
ERROR Error[[$invalidReservedType, "Attempt to set a TypedPrimitiveElement with reserved type as uninterpreted"]];
};
document.contents.docType _ docType;
oldContentsBits _ NoBytes;
}
 ELSE {
IF IsDocTypeUninterpretedOK[document.contents.docType] THEN {
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
ERROR Error[[$invalidReservedType, "Attempt to set a TypedPrimitiveElement with reserved type as uninterpreted"]];
};
oldContentsBits _ document.contents.bits;
};
[newRef: newRef, newBits: newBits] _ YggRep.BytesToBits[bits: oldContentsBits, startByte: firstByte, block: [base: LOOPHOLE[from], startIndex: 0, count: byteCount]];
IF newRef THEN document.contents.bits _ newBits;
document.contentsChanged _ TRUE;
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
RETURN[byteCount];
};
SetContents: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, contents: YggRep.TypedPrimitiveElement] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readWrite, [write, wait]];
[] _ YggRep.LatchVDoc[document];
document.contents _ contents;
document.contentsChanged _ TRUE;
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
GetSize: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID] RETURNS [size: CARD] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readWrite, [write, wait]];
[] _ YggRep.LatchVDoc[document];
IF IsDocTypeUninterpretedOK[document.contents.docType] THEN {
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
ERROR Error[[$invalidReservedType, "Attempt to get the size of a TypedPrimitiveElement with reserved type as uninterpreted"]];
};
size _ YggRep.SizeOfBits[bits: document.contents.bits];
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
SetSize: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, size: CARD] ~ {
document: YggRep.VDoc;
newRef: BOOL;
newBits: YggRep.Bits;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readWrite, [write, wait]];
[] _ YggRep.LatchVDoc[document];
IF IsDocTypeUninterpretedOK[document.contents.docType] THEN {
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
ERROR Error[[$invalidReservedType, "Attempt to set a TypedPrimitiveElement with reserved type as uninterpreted"]];
};
IF YggRep.SizeOfBits[bits: document.contents.bits] # size THEN {
[newRef: newRef, newBits: newBits] _ YggRep.SetSizeOfBits[bits: document.contents.bits, size: size];
IF newRef THEN document.contents.bits _ newBits;
document.contentsChanged _ TRUE;
};
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
GetProperty: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, propertyName: ROPE] RETURNS [propertyExists: BOOL _ FALSE, property: LIST OF YggRep.Attribute _ NIL] ~ {
document: YggRep.VDoc;
metaAttributesOnly: BOOL _ FALSE;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
IF Rope.Length[propertyName] > 0 THEN {
IF Rope.InlineFetch[propertyName, 0] = '$ THEN metaAttributesOnly _ TRUE;
};
document _ YggRep.VolatizeFromDID[transID: trans, did: did, metaAttributesOnly: metaAttributesOnly];
[] _ YggRep.LatchVDoc[document];
FOR aL: LIST OF YggRep.Attribute _ document.attributes, aL.rest UNTIL aL = NIL DO
IF Rope.Equal[aL.first.attributeName, propertyName] THEN {
property _ CONS[aL.first, property];
propertyExists _ TRUE;
};
ENDLOOP;
FOR aL: LIST OF YggRep.Attribute _ document.metaAttributes, aL.rest UNTIL aL = NIL DO
IF Rope.Equal[aL.first.attributeName, propertyName] THEN {
property _ CONS[aL.first, property];
propertyExists _ TRUE;
};
ENDLOOP;
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
GetAllProperties: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID] RETURNS [properties: LIST OF YggRep.Attribute] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did];
RETURN[document.attributes];
};
ListAllProperties: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID] RETURNS [propertyNames: LIST OF ROPE _ NIL] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did];
[] _ YggRep.LatchVDoc[document];
FOR aL: LIST OF YggRep.Attribute _ document.attributes, aL.rest UNTIL aL = NIL DO
FOR pN: LIST OF ROPE _ propertyNames, pN.rest UNTIL pN = NIL DO
IF Rope.Equal[aL.first.attributeName, pN.first] THEN EXIT;
REPEAT FINISHED => {
propertyNames _ CONS[aL.first.attributeName, propertyNames];
};
ENDLOOP;
ENDLOOP;
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
SetProperty: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, propertyName: ROPE, property: YggRep.Attribute, appendProperty: BOOL] ~ {
document: YggRep.VDoc;
somethingChanged: BOOL _ FALSE;
prev: LIST OF YggRep.Attribute _ NIL;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readWrite, [write, wait]];
[] _ YggRep.LatchVDoc[document];
SELECT TRUE FROM 
appendProperty AND property.value = NIL => NULL;  -- nothing to do
appendProperty AND property.value # NIL => {  -- add prop to end of list
somethingChanged _ TRUE;
IF document.attributes = NIL THEN document.attributes _ LIST[property]
 ELSE {
FOR aL: LIST OF YggRep.Attribute _ document.attributes, aL.rest UNTIL aL = NIL DO
IF aL.rest = NIL THEN {aL.rest _ LIST[property]; EXIT};
ENDLOOP;
};
};
~appendProperty AND property.value = NIL => {  -- delete all props of this name
IF document.attributes = NIL THEN RETURN -- nothing to do
 ELSE {
FOR aL: LIST OF YggRep.Attribute _ document.attributes, aL.rest UNTIL aL = NIL DO
IF Rope.Equal[aL.first.attributeName, propertyName] THEN {
somethingChanged _ TRUE;
IF prev = NIL THEN document.attributes _ aL.rest 
 ELSE prev.rest _ aL.rest;
LOOP;
};
prev _ aL;
ENDLOOP;
};
};
~appendProperty AND property.value # NIL => {  -- delete all props of this name and add this one
somethingChanged _ TRUE;
IF document.attributes = NIL THEN document.attributes _ LIST[property]
 ELSE {
FOR aL: LIST OF YggRep.Attribute _ document.attributes, aL.rest UNTIL aL = NIL DO
IF Rope.Equal[aL.first.attributeName, propertyName] THEN {
somethingChanged _ TRUE;
IF prev = NIL THEN document.attributes _ aL.rest 
 ELSE prev.rest _ aL.rest;
LOOP;
};
prev _ aL;
ENDLOOP;
IF prev = NIL THEN document.attributes _ LIST[property]
 ELSE prev.rest _ LIST[property];
};
};
ENDCASE;
IF somethingChanged THEN {
FOR aC: LIST OF ROPE _ document.namesOfAttributesChanged, aC.rest UNTIL aC = NIL DO
IF Rope.Equal[aC.first, propertyName] THEN EXIT;
REPEAT FINISHED => {
document.namesOfAttributesChanged _ CONS[propertyName, document.namesOfAttributesChanged];
};
ENDLOOP;
};
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
ConstructIntTPE: PUBLIC PROC [int: INT32] RETURNS [property: YggRep.TypedPrimitiveElement] ~ {
ri: REF INT32;
ri _ NEW[INT32 _ int];
property _ [YggRep.int, ri];
};
ConstructFloatTPE: PUBLIC PROC [float: REAL32] RETURNS [property: YggRep.TypedPrimitiveElement] ~ {
rReal: REF REAL32;
rReal _ NEW[REAL32 _ float];
property _ [YggRep.float, rReal];
};
ConstructDateTPE: PUBLIC PROC [date: YggRep.AccurateGMTRep] RETURNS [property: YggRep.TypedPrimitiveElement] ~ {
rAccurateGMT: YggRep.AccurateGMT;
rAccurateGMT _ NEW[YggRep.AccurateGMTRep _ date];
property _ [YggRep.date, rAccurateGMT];
};
ConstructShortRopeTPE: PUBLIC PROC [rope: ROPE] RETURNS [property: YggRep.TypedPrimitiveElement] ~ {
IF Rope.Find[rope, "\000"] = -1 THEN {
property _ [YggRep.shortRope, rope];
}
 ELSE ERROR Error[[$shortRopeWithNulls, "Rope has nulls"]];
};
ConstructRopeTPE: PUBLIC PROC [rope: ROPE] RETURNS [property: YggRep.TypedPrimitiveElement] ~ {
property _ [YggRep.rope, rope];
};
ConstructUninterpretedBytesTPE: PUBLIC PROC [docType: YggRep.DocType, bytes: LONG POINTER, size: CARD] RETURNS [property: YggRep.TypedPrimitiveElement] ~ {
nBytes: CARD;
rBits: REF YggRep.BitsRep;
IF IsDocTypeUninterpretedOK[docType] THEN ERROR Error[[$invalidReservedType, "Attempt to create a TypedPrimitiveElement with reserved type"]];
rBits _ NEW[YggRep.BitsRep[size]];
rBits.validBytes _ size;
TRUSTED {nBytes _ PBasics.ByteBlt[
from: [blockPointer: bytes, startIndex: 0, stopIndexPlusOne: size], 
to: [blockPointer: LOOPHOLE[rBits, LONG POINTER] + SIZE[YggRep.BitsRep[0]], startIndex: 0, stopIndexPlusOne: size]];
};
IF nBytes # size THEN ERROR;
property _ [docType, rBits];
};
getTypedLinks: PROC [links: LIST OF YggRep.AttributeValue, linksChanged: LIST OF YggRep.linkMod, linkType: ROPE] RETURNS [dids: LIST OF DID _ NIL] ~ {
lastDIDs: LIST OF DID _ NIL;
FOR linkList: LIST OF YggRep.AttributeValue _ links, linkList.rest UNTIL linkList = NIL DO
IF linkType = NIL OR Rope.Equal[linkType, linkList.first.fieldName, FALSE] THEN {
FOR lotpe: LIST OF YggRep.TypedPrimitiveElement _ linkList.first.valueSet, lotpe.rest UNTIL lotpe = NIL DO
linkDID: DID;
IF lotpe.first.docType # YggRep.did THEN ERROR;
linkDID _ NARROW[lotpe.first.bits];
IF dids = NIL THEN lastDIDs _ (dids _ LIST[linkDID])
 ELSE lastDIDs.rest _ LIST[linkDID];
ENDLOOP;
};
ENDLOOP;
FOR lolm: LIST OF YggRep.linkMod _ linksChanged, lolm.rest UNTIL lolm = NIL DO
IF linkType = NIL AND ~Rope.Equal[lolm.first.linkName, linkType, FALSE] THEN LOOP;
IF lolm.first.add THEN {
IF lastDIDs = NIL THEN lastDIDs _ (dids _ LIST[lolm.first.linkValue])
 ELSE lastDIDs.rest _ LIST[lolm.first.linkValue];
}
 ELSE {
prevLod: LIST OF DID _ NIL;
FOR lod: LIST OF DID _ dids, lod.rest UNTIL lod = NIL DO
IF YggDID.EqualDIDs[lod.first, lolm.first.linkValue] THEN {
IF prevLod = NIL THEN dids _ dids.rest
 ELSE prevLod.rest _ lod.rest;
IF lastDIDs = lod THEN lastDIDs _ prevLod;
EXIT;
};
prevLod _ lod;
ENDLOOP;
};
ENDLOOP;
};

getLinks: PROC [links: LIST OF YggRep.AttributeValue, linksChanged: LIST OF YggRep.linkMod] RETURNS [currentLinks: LIST OF YggNav.LinkList _ NIL] ~ {
lastCurrentLinks: LIST OF YggNav.LinkList _ NIL;
FOR linkList: LIST OF YggRep.AttributeValue _ links, linkList.rest UNTIL linkList = NIL DO
dids: LIST OF DID _ NIL;
lastDIDs: LIST OF DID _ NIL;
FOR lotpe: LIST OF YggRep.TypedPrimitiveElement _ linkList.first.valueSet, lotpe.rest UNTIL lotpe = NIL DO
linkDID: DID;
IF lotpe.first.docType # YggRep.did THEN ERROR;
linkDID _ NARROW[lotpe.first.bits];
IF dids = NIL THEN lastDIDs _ (dids _ LIST[linkDID])
 ELSE lastDIDs.rest _ LIST[linkDID];
ENDLOOP;
IF currentLinks = NIL THEN currentLinks _ lastCurrentLinks _ LIST[[linkList.first.fieldName, dids]]
 ELSE lastCurrentLinks.rest _ LIST[[linkList.first.fieldName, dids]];
ENDLOOP;
FOR lolm: LIST OF YggRep.linkMod _ linksChanged, lolm.rest UNTIL lolm = NIL DO
FOR curLnk: LIST OF YggNav.LinkList _ currentLinks, curLnk.rest UNTIL curLnk = NIL DO
IF ~Rope.Equal[curLnk.first.linkName, lolm.first.linkName, FALSE] THEN LOOP;
IF lolm.first.add THEN {
curLnk.first.dids _ CONS[lolm.first.linkValue, curLnk.first.dids];
}
 ELSE {
prevLod: LIST OF DID _ NIL;
FOR lod: LIST OF DID _ curLnk.first.dids, lod.rest UNTIL lod = NIL DO
IF YggDID.EqualDIDs[lod.first, lolm.first.linkValue] THEN {
IF prevLod = NIL THEN curLnk.first.dids _ curLnk.first.dids.rest
 ELSE prevLod.rest _ lod.rest;
EXIT;
};
prevLod _ lod;
ENDLOOP;
};
REPEAT FINISHED => IF lolm.first.add THEN {
IF currentLinks = NIL THEN currentLinks _ lastCurrentLinks _ LIST[[lolm.first.linkName, LIST [lolm.first.linkValue]]]
 ELSE lastCurrentLinks.rest _ LIST[[lolm.first.linkName, LIST [lolm.first.linkValue]]];
};
ENDLOOP;
ENDLOOP;
};

GetTypedOutlinks: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, linkType: ROPE] RETURNS [outlinks: LIST OF DID _ NIL] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readOnly, [read, wait]];
[] _ YggRep.LatchVDoc[document];
outlinks _ getTypedLinks[document.outlinks, document.outlinksChanged, linkType];
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
GetAllOutlinks: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID] RETURNS [outlinks: LIST OF YggNav.LinkList _ NIL] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readOnly, [read, wait]];
[] _ YggRep.LatchVDoc[document];
outlinks _ getLinks[document.outlinks, document.outlinksChanged];
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
GetTypedInlinks: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, linkType: ROPE] RETURNS [inlinks: LIST OF DID _ NIL] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readOnly, [read, wait]];
[] _ YggRep.LatchVDoc[document];
inlinks _ getTypedLinks[document.inlinks, document.inlinksChanged, linkType];
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
GetAllInlinks: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID] RETURNS [inlinks: LIST OF YggNav.LinkList _ NIL] ~ {
document: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readOnly, [read, wait]];
[] _ YggRep.LatchVDoc[document];
inlinks _ getLinks[document.inlinks, document.inlinksChanged];
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
SnapLink: PUBLIC PROC [trans: YggEnvironment.TransID, fromDID: DID, toDID: DID, linkType: ROPE] RETURNS [linkDID: DID _ NIL] ~ {
lastLinkMod: LIST OF YggRep.linkMod _ NIL;
newLinkMod: LIST OF YggRep.linkMod _ NIL;
fromVDoc: YggRep.VDoc;
toVDoc: YggRep.VDoc;
linkVDoc: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
fromVDoc _ YggRep.VolatizeFromDID[trans, fromDID, readWrite, [write, wait]];
toVDoc _ YggRep.VolatizeFromDID[trans, toDID, readOnly, [read, wait]];
[] _ YggRep.LatchVDoc[fromVDoc];
FOR lolm: LIST OF YggRep.linkMod _ fromVDoc.outlinksChanged, lolm.rest UNTIL lolm = NIL DO
lastLinkMod _ lolm;
ENDLOOP;
linkDID _ YggDIDMap.CreateNewDID[trans];
linkVDoc _ YggRep.VolatizeFromDID[trans, linkDID, readWrite, [write, wait]];
linkVDoc.fromDID _ fromDID;
linkVDoc.toDID _ toDID;
linkVDoc.linkType _ linkType;
linkVDoc.contents.docType _ YggRep.noValue;
linkVDoc.linkChanged _ TRUE;
newLinkMod _ LIST[[TRUE, linkType, linkDID]];
IF lastLinkMod = NIL THEN fromVDoc.outlinksChanged _ newLinkMod
 ELSE lastLinkMod.rest _ newLinkMod;
IF ~YggRep.UnlatchVDoc[fromVDoc] THEN ERROR;
[] _ YggRep.LatchVDoc[toVDoc];
lastLinkMod _ NIL;
FOR lolm: LIST OF YggRep.linkMod _ toVDoc.inlinksChanged, lolm.rest UNTIL lolm = NIL DO
lastLinkMod _ lolm;
ENDLOOP;
newLinkMod _ LIST[[TRUE, linkType, linkDID]];
IF lastLinkMod = NIL THEN toVDoc.inlinksChanged _ newLinkMod
 ELSE lastLinkMod.rest _ newLinkMod;
YggTransaction.NotePossibleDocumentUpdate[trans, toVDoc];
IF ~YggRep.UnlatchVDoc[toVDoc] THEN ERROR;
};

RemoveLink: PUBLIC PROC [trans: YggEnvironment.TransID, linkDID: YggDID.DID] ~ {
lastLinkMod: LIST OF YggRep.linkMod _ NIL;
newLinkMod: LIST OF YggRep.linkMod _ NIL;
fromVDoc: YggRep.VDoc;
toVDoc: YggRep.VDoc;
linkVDoc: YggRep.VDoc;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
linkVDoc _ YggRep.VolatizeFromDID[trans, linkDID, readWrite, [write, wait]];
[] _ YggRep.LatchVDoc[linkVDoc];
fromVDoc _ YggRep.VolatizeFromDID[trans, linkVDoc.fromDID, readWrite, [write, wait]];
toVDoc _ YggRep.VolatizeFromDID[trans, linkVDoc.toDID, readOnly, [read, wait], TRUE];
YggDIDMap.DestroyDID[trans, linkDID];
IF ~YggRep.UnlatchVDoc[linkVDoc] THEN ERROR;
[] _ YggRep.LatchVDoc[fromVDoc];
FOR lolm: LIST OF YggRep.linkMod _ fromVDoc.outlinksChanged, lolm.rest UNTIL lolm = NIL DO
lastLinkMod _ lolm;
ENDLOOP;
newLinkMod _ LIST[[FALSE, linkVDoc.linkType, linkDID]];
IF lastLinkMod = NIL THEN fromVDoc.outlinksChanged _ newLinkMod
 ELSE lastLinkMod.rest _ newLinkMod;
IF ~YggRep.UnlatchVDoc[fromVDoc] THEN ERROR;
[] _ YggRep.LatchVDoc[toVDoc];
lastLinkMod _ NIL;
FOR lolm: LIST OF YggRep.linkMod _ toVDoc.inlinksChanged, lolm.rest UNTIL lolm = NIL DO
lastLinkMod _ lolm;
ENDLOOP;
newLinkMod _ LIST[[FALSE, linkVDoc.linkType, linkDID]];
IF lastLinkMod = NIL THEN toVDoc.inlinksChanged _ newLinkMod
 ELSE lastLinkMod.rest _ newLinkMod;
YggTransaction.NotePossibleDocumentUpdate[trans, toVDoc];
IF ~YggRep.UnlatchVDoc[toVDoc] THEN ERROR;
};
GetDefaultContainer: PUBLIC PROC [trans: YggEnvironment.TransID] RETURNS [did: DID _ NIL] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
did _ YggTransaction.GetDefaultContainer[trans];
};
SetDefaultContainer: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
YggTransaction.SetDefaultContainer[trans, did];
};
AddToContainer: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, containerDID: DID] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
addOrRemoveContainer[trans, did, containerDID, TRUE, Parents, Children];
};
RemoveFromContainer: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, containerDID: DID] RETURNS [ok: BOOL _ TRUE] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
addOrRemoveContainer[trans, did, containerDID, FALSE, Parents, Children];
};
GetObjectsInContainer: PUBLIC PROC [trans: YggEnvironment.TransID, containerDID: DID, dontWait: BOOL] RETURNS [dids: LIST OF DID, success: BOOL] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
[dids, success] _ listContainer [trans, containerDID, Children, dontWait];
};
GetParents: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID, dontWait: BOOL] RETURNS [dids: LIST OF DID _ NIL, success: BOOL] ~ {
[dids, success] _ listContainer [trans, did, Parents, dontWait];
};
AddContainerToContainer: PUBLIC PROC [trans: YggEnvironment.TransID, subcontainerDID: DID, containerDID: DID] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
addOrRemoveContainer[trans, subcontainerDID, containerDID, TRUE, ParentContainers, ChildContainers];
};
RemoveContainerFromContainer: PUBLIC PROC [trans: YggEnvironment.TransID, subcontainerDID: DID, containerDID: DID] RETURNS [ok: BOOL _ TRUE] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
addOrRemoveContainer[trans, subcontainerDID, containerDID, FALSE, ParentContainers, ChildContainers];
};
GetContainersInContainer: PUBLIC PROC [trans: YggEnvironment.TransID, containerDID: DID, dontWait: BOOL] RETURNS [dids: LIST OF DID _ NIL, success: BOOL] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
[dids, success] _ listContainer [trans, containerDID, ChildContainers, dontWait];
};

GetSuperContainers: PUBLIC PROC [trans: YggEnvironment.TransID, containerDID: DID, dontWait: BOOL] RETURNS [dids: LIST OF DID _ NIL, success: BOOL] ~ {
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
[dids, success] _ listContainer [trans, containerDID, ParentContainers, dontWait];
};

addOrRemoveContainer: PROC [trans: YggEnvironment.TransID, did: DID, containerDID: DID, add: BOOL, pAN: ROPE, cN: ROPE, dontLatchDoc: BOOL _ FALSE] ~ {
document: YggRep.VDoc;
containerDocument: YggRep.VDoc;
newCVal: LIST OF YggRep.metaAttributeMod;
document _ YggRep.VolatizeFromDID[trans, did, readWrite, [write, wait]];
IF ~dontLatchDoc THEN {
[] _ YggRep.LatchVDoc[document];
};
newCVal _ LIST [[attributeName: pAN, add: add, didValue: containerDID, stringValue: NIL]];
IF document.metaAttributesChanged = NIL THEN document.metaAttributesChanged _ newCVal
 ELSE {
prev: LIST OF YggRep.metaAttributeMod _ NIL;
FOR macl: LIST OF YggRep.metaAttributeMod _ document.metaAttributesChanged, macl.rest UNTIL macl = NIL DO
prev _ macl;
ENDLOOP;
prev.rest _ newCVal;
};
IF ~dontLatchDoc THEN {
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
containerDocument _ YggRep.VolatizeFromDID[trans, containerDID, readWrite, [write, wait]];
[] _ YggRep.LatchVDoc[containerDocument];
newCVal _ LIST [[attributeName: cN, add: add, didValue: did, stringValue: NIL]];
IF containerDocument.metaAttributesChanged = NIL THEN containerDocument.metaAttributesChanged _ newCVal
 ELSE {
prev: LIST OF YggRep.metaAttributeMod _ NIL;
FOR macl: LIST OF YggRep.metaAttributeMod _ containerDocument.metaAttributesChanged, macl.rest UNTIL macl = NIL DO
prev _ macl;
ENDLOOP;
prev.rest _ newCVal;
};
[] _ YggRep.UnlatchVDoc[containerDocument];
};

listContainer: PROC [trans: YggEnvironment.TransID, did: DID, pAN: ROPE, dontWait: BOOL, dontLatch: BOOL _ FALSE] RETURNS[didList:  LIST OF DID _ NIL, success: BOOL _ TRUE] ~ {
document: YggRep.VDoc;
lastDidList:  LIST OF DID _ NIL;
didCountItem: TYPE = RECORD [
count: INT _ 0,
did: DID
];
modifiedDIDs: LIST OF didCountItem _ NIL;
stdValues: LIST OF YggRep.TypedPrimitiveElement _ NIL;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
document _ YggRep.VolatizeFromDID[trans, did, readWrite, [write, IF dontWait THEN fail ELSE wait]];
IF ~dontLatch THEN {
IF ~YggRep.LatchVDoc[document, ~dontWait] THEN RETURN[NIL, FALSE];
};
FOR loa: LIST OF YggRep.Attribute _ document.metaAttributes, loa.rest UNTIL loa = NIL DO
IF Rope.Equal[loa.first.attributeName, pAN] THEN {stdValues _ loa.first.value.first.valueSet; EXIT};
ENDLOOP;
FOR lotpe: LIST OF YggRep.TypedPrimitiveElement _ stdValues, lotpe.rest UNTIL lotpe = NIL DO
tpe: YggRep.TypedPrimitiveElement _ lotpe.first;
forgetIt: BOOL _ FALSE;
didOnList: DID;
didl2add: LIST OF DID _ NIL;
IF tpe.docType # YggRep.did THEN ERROR;
didOnList _ NARROW[tpe.bits];
FOR macl: LIST OF YggRep.metaAttributeMod _ document.metaAttributesChanged, macl.rest UNTIL macl = NIL DO
IF ~Rope.Equal[pAN, macl.first.attributeName] THEN LOOP;
IF ~YggDID.EqualDIDs[macl.first.didValue, didOnList] THEN LOOP;
forgetIt _ TRUE;
FOR mdlist: LIST OF didCountItem _ modifiedDIDs, mdlist.rest UNTIL mdlist = NIL DO
IF YggDID.EqualDIDs[mdlist.first.did, didOnList] THEN {
mdlist.first.count _ mdlist.first.count + 1;
EXIT;
};
REPEAT FINISHED => modifiedDIDs _ CONS[[1, didOnList], modifiedDIDs];
ENDLOOP;
EXIT;
ENDLOOP;
IF forgetIt THEN LOOP;
didl2add _ LIST[didOnList];
IF didList = NIL THEN lastDidList _ didList _ didl2add
 ELSE lastDidList _ (lastDidList.rest _ didl2add);
ENDLOOP;
FOR macl: LIST OF YggRep.metaAttributeMod _ document.metaAttributesChanged, macl.rest UNTIL macl = NIL DO
IF ~Rope.Equal[pAN, macl.first.attributeName] THEN LOOP;
FOR mdlist: LIST OF didCountItem _ modifiedDIDs, mdlist.rest UNTIL mdlist = NIL DO
IF YggDID.EqualDIDs[mdlist.first.did, macl.first.didValue] THEN {
IF macl.first.add THEN mdlist.first.count _ mdlist.first.count + 1
 ELSE mdlist.first.count _ mdlist.first.count - 1;
EXIT;
};
REPEAT FINISHED => ERROR;
ENDLOOP;
ENDLOOP;
FOR mdlist: LIST OF didCountItem _ modifiedDIDs, mdlist.rest UNTIL mdlist = NIL DO
IF mdlist.first.count > 0 THEN {
FOR i: INT IN [1..mdlist.first.count] DO
didl2add: LIST OF DID _ NIL;
didl2add _ LIST[mdlist.first.did];
IF didList = NIL THEN lastDidList _ didList _ didl2add
 ELSE lastDidList _ (lastDidList.rest _ didl2add);
ENDLOOP;
};
ENDLOOP;
IF ~dontLatch THEN {
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};
};

AddIndexPatternToContainer: PUBLIC PROC [containerDID: YggDID.DID, pattern: ROPE] RETURNS [patternOK: BOOL] ~ {
patternOK _ YggIndexMaint.AddOrRemoveIndexPattern[containerDID: containerDID, pattern: pattern, add: TRUE]
};
RemoveIndexPatternFromContainer: PUBLIC PROC [containerDID: YggDID.DID, pattern: ROPE] RETURNS [ok: BOOL] ~ {
ok _ YggIndexMaint.AddOrRemoveIndexPattern[containerDID: containerDID, pattern: pattern, add: FALSE]
};

GetPatternsInContainer: PUBLIC PROC [containerDID: YggDID.DID, dontWait: BOOL] RETURNS [patterns: LIST OF ROPE _ NIL, success: BOOL _ TRUE] ~ {
document: YggRep.VDoc;
lastPattern:  LIST OF ROPE _ NIL;
stdValues: LIST OF YggRep.AttributeValue _ NIL;
document _ YggRep.VolatizeFromDID[YggEnvironment.nullTransID, containerDID, readOnly, [read, IF dontWait THEN fail ELSE wait], TRUE];
IF ~YggRep.LatchVDoc[document, ~dontWait] THEN RETURN[NIL, FALSE];
FOR loa: LIST OF YggRep.Attribute _ document.metaAttributes, loa.rest UNTIL loa = NIL DO
IF Rope.Equal[loa.first.attributeName, AutoIndices] THEN {stdValues _ loa.first.value; EXIT};
ENDLOOP;
FOR loav: LIST OF YggRep.AttributeValue _ stdValues, loav.rest UNTIL loav = NIL DO
indexPattern: ROPE _ NIL;
tpe: YggRep.TypedPrimitiveElement _ loav.first.valueSet.first;
SELECT tpe.docType FROM
YggRep.rope, YggRep.shortRope => {
indexPattern _ NARROW[tpe.bits];
};
ENDCASE => ERROR;
IF lastPattern = NIL THEN patterns _ LIST[indexPattern]
 ELSE lastPattern _ (lastPattern.rest _ LIST[indexPattern]);
ENDLOOP;
IF ~YggRep.UnlatchVDoc[document] THEN ERROR;
};

CreateObject: PUBLIC PROC [trans: YggEnvironment.TransID, containerDID: DID, makeRoot: BOOL] RETURNS [did: DID _ NIL] ~ {
foundTrans: BOOL _ FALSE;
activeTrans: BOOL _ FALSE;
ok: BOOL _ FALSE;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
IF containerDID = NIL OR YggDID.EqualDIDs[containerDID, YggEnvironment.nullDID] THEN containerDID _ GetDefaultContainer[trans];
IF (containerDID = NIL OR YggDID.EqualDIDs[containerDID, YggEnvironment.nullDID]) AND ~makeRoot THEN ERROR Error[error: [code: $invalidDID, explanation: "default container and the containerDID specified are both null; a object must have a container"]];
did _ YggDIDMap.CreateNewDID[trans];
IF containerDID # NIL THEN AddToContainer[trans, did, containerDID];
IF makeRoot THEN ok _ YggDIDMap.AddRootDID[did];
};
RemoveObject: PUBLIC PROC [trans: YggEnvironment.TransID, did: DID] ~ {
vDoc: YggRep.VDoc;
kidDIDs: LIST OF DID;
superDIDs: LIST OF DID;
subDIDs: LIST OF DID;
parentDIDs: LIST OF DID;
success: BOOL _ TRUE;
IF YggTransaction.Check[transID: trans] # active THEN ERROR Error [ [$invalidTrans, "transaction not active"]];
vDoc _ YggRep.VolatizeFromDID[trans, did, readWrite, [write, wait]];
IF vDoc.outlinks # NIL OR vDoc.inlinks # NIL OR vDoc.outlinksChanged # NIL OR vDoc.inlinksChanged # NIL THEN ERROR;  -- doesn't handle recursive delete yet
[] _ YggRep.LatchVDoc[vDoc];
[didList: kidDIDs, success: success] _ listContainer[trans: trans, did: did, pAN: Children, dontWait: FALSE, dontLatch: TRUE];
IF kidDIDs # NIL THEN {
IF ~YggRep.UnlatchVDoc[vDoc] THEN ERROR;
ERROR Error[error: [code: $containerMustBeEmpty, explanation: "attempt to remove an object that is the root of a container that has objects in it"]];
};
[didList: subDIDs, success: success] _ listContainer[trans: trans, did: did, pAN: ChildContainers, dontWait: FALSE, dontLatch: TRUE];
IF subDIDs # NIL THEN {
IF ~YggRep.UnlatchVDoc[vDoc] THEN ERROR;
ERROR Error[error: [code: $containerMustBeEmpty, explanation: "attempt to remove an object that is the root of a container that has containers in it"]];
};

[didList: parentDIDs, success: success] _ listContainer[trans: trans, did: did, pAN: Parents, dontWait: FALSE, dontLatch: TRUE];
[didList: superDIDs, success: success] _ listContainer[trans: trans, did: did, pAN: ParentContainers, dontWait: FALSE, dontLatch: TRUE];

FOR lopd: LIST OF DID _ parentDIDs, lopd.rest UNTIL lopd = NIL DO
addOrRemoveContainer[trans: trans, did: did, containerDID: lopd.first, add: FALSE, pAN: Parents, cN: Children, dontLatchDoc: TRUE];
ENDLOOP;
FOR lopd: LIST OF DID _ superDIDs, lopd.rest UNTIL lopd = NIL DO
addOrRemoveContainer[trans: trans, did: did, containerDID: lopd.first, add: FALSE, pAN: ParentContainers, cN: ChildContainers, dontLatchDoc: TRUE];
ENDLOOP;
vDoc.destroyed _ TRUE;
YggDIDMap.DestroyDID[trans, did];
IF ~YggRep.UnlatchVDoc[vDoc] THEN ERROR;
};
NoBytes _ NEW[YggRep.BitsRep[0]];

END.
êYggNavImpl.mesa
Copyright Ó 1988, 1989 by Xerox Corporation.  All rights reserved.
Bob Hagmann March 10, 1989 1:04:08 pm PST


Top level navigational ``interface'' for Yggdrasil.

Types, variables, and constants
Fixed names for properties
Fixed names for index prefix
Fixed names for directory
Fixed names for NFS
Transactions
Start up a new transaction.

Commit or abort a transaction.

Check on a transaction.  If it no found, then active and committed are not meaningful.  If found, then if active then committed is not meaningful.  If not active, then the commit state is returned in committed.  Old transactions will not be found.
Root objects
Note: none of the root operations operate under transaction (or any other!) control

Get all the root objects for the service.

Add a root object.  If the DID does not exist, FALSE will be returned.

Remove a root object.  If the DID is not a root object, FALSE will be returned.
Object contents
Get the contents of the object with the specified did.
Errors: $invalidDID, $invalidTrans

Get the contents of the object with the specified did.  The contents must not be a well known interpreted type (e. g., int, date, float, ...)
Errors: $invalidDID, $invalidTrans, $invalidReservedType

Get the contents of the object with the specified did.
Errors: $invalidDID, $invalidTrans

Set the contents of the object with the specified did.  The object is grown if needed.  The contents type is changed if setDocType is TRUE to docType.
Errors: $invalidDID, $invalidTrans

Set the contents of the object with the specified did.  The object is grown if needed.
Errors: $invalidDID, $invalidTrans

Get the size contents of the object with the specified did.
Errors: $invalidDID, $invalidTrans, 

Set the size contents of the object with the specified did.  The object is grown if needed.
Errors: $invalidDID, $invalidTrans, 

Object property manipulation
Get the named property of the object with the specified did.  If the property does not exist, [FALSE, NIL] is returned.
Errors: $invalidDID, $invalidTrans

Get all the properties of the object with the specified did.  If no properties exist, NIL is returned.
Errors: $invalidDID, $invalidTrans

Get all the property names of the object with the specified did.  If no properties exist, NIL is returned.
Errors: $invalidDID, $invalidTrans

Set the named property of the object with the specified did.  If appendProperty is TRUE, the property is appended.  If FALSE, it first destroys all properties with this name.  A NIL value for the property with appendProperty as TRUE is a noop, and with appendProperty as FALSE deletes the property.  A non-NIL value for the property with appendProperty as FALSE makes the new property the one and only value for the property.
Errors: $invalidDID, $invalidTrans

Object property construction
Note: all of these procedures copy data.

Construct a YggRep.TypedPrimitiveElement for a 32 bit integer.
Errors: $invalidDID, $invalidTrans

Construct a YggRep.TypedPrimitiveElement for a 32 bit real.

Construct a YggRep.TypedPrimitiveElement for a date.

Construct a YggRep.TypedPrimitiveElement for a ROPE that is short (less than a few disk pages preferred) and contains no nulls.
Errors: $shortRopeWithNulls

Construct a YggRep.TypedPrimitiveElement for a ROPE that is long (more than a disk page preferred) and may contain no nulls.

Construct a YggRep.TypedPrimitiveElement for an array of bytes.
Errors: $$invalidReservedType
Links
Get the did's of all the outlinks for this object with "link type" propertyName.
Errors: $invalidDID, $invalidTrans

Get the did's of all the outlinks for this object.
Errors: $invalidDID, $invalidTrans

Get the did's of all the inlinks for this object with "link type" propertyName.
Errors: $invalidDID, $invalidTrans

Get the did's of all the inlinks for this object.
Errors: $invalidDID, $invalidTrans

Construct a link between the two dids.
Errors: $invalidDID, $invalidTrans
Remove a link.
Errors: $invalidDID, $invalidTrans
Containers
Get the default container for this transaction.
Errors: $invalidTrans

Set the default container for this transaction.
Errors: $invalidDID, $invalidTrans

Add the object to the container.
Errors: $invalidDID, $invalidTrans

Remove the object from the container.
Errors: $invalidDID, $invalidTrans

Get the did's of all the objects in this container.  containerDID of NIL means use the default container.
Errors: $invalidDID, $invalidTrans

Get the did's of all the parents.
Errors: $invalidDID, $invalidTrans

Add the subcontainer to the container.
Errors: $invalidDID, $invalidTrans

Remove the subcontainer from the container.
Errors: $invalidDID, $invalidTrans

Get the did's of all the containers in this container.  containerDID of NIL means use the default container.
Errors: $invalidDID, $invalidTrans
Get the did's of all the containers containing this container.
Errors: $invalidDID, $invalidTrans
Add the object to the container.
Errors: $invalidDID, $invalidTrans
Add the object to the container.
Errors: $invalidDID, $invalidTrans
find the right list
flip through looking for DID's that don't have any modifications
flip through the mods and see which are visible
spit out dids still visible
Indexing in containers
Add the pattern to index on for the container.
Errors: $invalidDID

Remove the pattern..
Errors: $invalidDID
Get the patterns in this container.
Errors: $invalidDID
find the right list
flip through looking for DID's that don't have any modifications

Object creation and destruction
Make up a new object in the specified container.  The default container for the transaction is used if containerDID is NIL.
Errors: $invalidDID, $invalidTrans

Remove a object.  Any links pointing to this object are also removed.  This is a recursive process (if the links are really objects).  
Errors: $invalidDID, $invalidTrans

Initialization
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