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Subject: Formula Sub Committee Draft Charter
Dear TC members,
as promised, please find below a proposal for a formula sub committee
charter. The proposal contains some explanatory notes, that will not become
part of the charter.
The charter does not make any assumption whether the TC creates an entirely
new specification, or uses a specification or proposal that is submitted to
the OpenDocument TC as basis for its work. This means that the SC may use the
OpenFormula specification (or any other proposal) as basis for its work if it
is submitted to the OpenDocument TC, and if an analysis of the proposal shows
that this is appropriate.
Best regards
Michael
OpenDocument Spreadsheet Formula Sub Committee (FSC) Draft Charter
==================================================================
Statement of purpose
--------------------
To create a specification for a formula language which can be used in
OpenDocument v1.0 spreadsheet documents as value of the table:formula
attribute specified in section 8.1.3 in addition to the application dependent
formula languages that are supported by OpenDocument v1.0. The formula
language specified by this SC shall be usable in cases where none of the
application dependent aspects of existing formula languages are required.
[Note: OpenDocument already supports the inclusion of arbitrary formula
languages for spreadsheet documents. Furthermore, it already uses XML
namespaces to uniquely identify the formula language used within a certain
formula. The purpose of this SC therefore is not to define a formula language
that covers all, sometimes very application dependent, aspects of existing
formula languages, but to define an application independent and, compared to
existing formula languages, possibly restricted formula language that can be
used in all cases where non of the application dependent aspects are required.]
The resulting specification must meet the following requirements.
1. It must specify a grammar for formulas.
2. It must specify a well defined processing model. The description of the
processing model should be oriented on the description of processing
models of programming languages.
[Note: Since office applications are implemented using programming
languages, formula languages have the same platform dependence regarding
the precision of float calculations as programming languages; for this
reason, it seems to be reasonable to orient the the processing model
specification on programming language specifications.]
3. It must specify a basic function set. The basic function set must be
extendible in future versions of the specification.
[Note: Functions sets correspond to function or class libraries of
programming languages. The basic function set corresponds to the build-in
function or class libraries of programming languages.]
4. It must permit application specific extension functions.
[Note: These correspond to additional function or class libraries that are
deployed for interpreted programming languages.]
5. It must permit application specific extensions to the processing model.
[Note: Ideally, application specific formula languages can be (re-)defined
as extensions to the formula language specified by this SC. This may
require extensions to the processing model, for instance implicit type
conversions.]
6. It must be friendly to conversions from and to existing office application
spreadsheet formula languages.
Deliverables
------------
1. A written specifications for spreadsheet formulas in plain English that
can be used with the OpenDocument v1.0 specification, and also can be
included into a future version of OpenDocument. This specification shall
be delivered in two phases:
1. A specification for of the formula grammar (syntax).
2. A specification for the processing model and the basic function set
(semantic).
Scope of work
-------------
The subcommittee's work is to create a base specification for a spreadsheet
formula language to be used with OpenDocument. The specification shall permit
the creation of OpenDocument spreadsheet documents whose formulas are
exchangeable between applications.
Manner and schedule of work
---------------------------
The work of the subcommittee will be primarily through conference calls and a
mail list set up by OASIS for subcommittee work. Access by the public will be
through an openly available mail list archive.
Conference calls will be scheduled on a regular basis as agreed by the sub
committee after its formation.
Proposed chair: [TBD]
Proposed secretary: [TBD]
Proposed editor: [TBD]
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