stream_schema

Python

Python does not export this type.

Julia

struct OutputSchema
OutputSchema(dims::Vector{Pair{String, Int64}}, time_dim::String, coords::Vector{Pair{String, Tuple{Vector, Dict{String, Any}}}}, vars::Vector{Pair{String, OutputVar}}, chunk_shape::Dict{String, Int64}, shard_shape::Dict{String, Int64}, profile::Symbol, attrs::Dict{String, Any}, time_dtype::DataType, statics::Vector{Pair{String, OutputVar}}, time_mode::Union{Symbol, IndexedTime})
OutputSchema(dims, time_dim, coords, vars, chunk_shape, shard_shape, profile, attrs, time_dtype, statics, time_mode)
OutputSchema(; dims, time_dim, vars, chunk_shape, shard_shape, coords, profile, attrs, time_dtype, statics, time_mode)

OutputSchema(; dims, time_dim, vars, chunk_shape, shard_shape,
               coords=[], statics=[], time_mode=:append,
               profile=:diagnostic, attrs=Dict(), time_dtype=Float64)

The input to [write_open!] — a plain struct in this repo (the EarthSciAST OutputSchema maps onto it at the binding layer; no EarthSciAST dependency here). It is the spec/writer.md §3 stream schema.

Fields (all load-bearing for the binding to construct):

• dims::Vector{Pair{String,Int}} — ORDERED dim name => length. In :append mode the time_dim entry’s length is a placeholder (0 is conventional); the time axis grows. In indexed mode it is n_records (filled in when 0).
• time_dim::String — the record axis name.
• coords::Vector{Pair{String,Tuple{Vector,Dict{String,Any}}}} — ORDERED static coordinate arrays: name => (values, attrs). 1-D over their own dim; written once at write_open!. An entry for time_dim supplies the time coordinate’s attrs (its VALUES are ignored — they come from the t of each record).
• vars::Vector{Pair{String,OutputVar}} — ORDERED streaming variables.
• chunk_shape::Dict{String,Int} — dim name => INNER chunk length.
• shard_shape::Dict{String,Int} — dim name => SHARD length (must be a multiple of the inner chunk length along every dim). shard_shape[time_dim] is the number of records packed per shard object.
• profile::Symbol — :diagnostic/:checkpoint (Blosc-zstd inner codec) or :wasm (plain v3 zstd inner codec, no Blosc — wasm/browser-loadable).
• attrs::Dict{String,Any} — group-level attributes.
• time_dtype::DataType — element type of the time coordinate (default Float64).
• statics::Vector{Pair{String,OutputVar}} — ORDERED time-less variables (gradient fields, …) written once each with [write_static!].
• time_mode — :append (default) or an [IndexedTime].

Source

Rust

pub struct StreamSchema {
    pub dims: Vec<(String, usize)>,
    pub time_dim: String,
    pub chunk_shape: BTreeMap<String, usize>,
    pub shard_shape: BTreeMap<String, usize>,
    pub coords: Vec<WriteCoord>,
    pub vars: Vec<StreamVar>,
    pub statics: Vec<StreamVar>,
    pub time_mode: TimeMode,
    pub group_attrs: Map<String, Value>,
    pub profile: String,
}

The stream schema: the v1 OutputSchema without data, plus a time mode, statics and per-variable dtypes.

Source · Rust docs